\begin{tikzpicture}[line join=round]%
\begin{scope}%
\clip (-0.5,-0.5) rectangle (5.3461538461538,9.5);%
\begin{scope}%
\pgfsetstrokecolor{gray}%
\pgfsetroundcap%
\draw[-] (0,0) -- (0,9) (0.6923,0) -- (0.6923,9) (1.3846,0) -- (1.3846,9) (2.0769,0) -- (2.0769,9) (2.7692,0) -- (2.7692,9) (3.4615,0) -- (3.4615,9) (4.1538,0) -- (4.1538,9) (4.8462,0) -- (4.8462,9) (0,0) -- (4.8462,0) (0,0.6923) -- (4.8462,0.6923) (0,1.3846) -- (4.8462,1.3846) (0,2.0769) -- (4.8462,2.0769) (0,2.7692) -- (4.8462,2.7692) (0,3.4615) -- (4.8462,3.4615) (0,4.1538) -- (4.8462,4.1538) (0,4.8462) -- (4.8462,4.8462) (0,5.5385) -- (4.8462,5.5385) (0,6.2308) -- (4.8462,6.2308) (0,6.9231) -- (4.8462,6.9231) (0,7.6154) -- (4.8462,7.6154) (0,8.3077) -- (4.8462,8.3077) (0,9) -- (4.8462,9);%
\end{scope}%
\draw[-Stealth] (0,2.7692) -- (4.8462,2.7692);%
\draw[-] (4.7345,2.9692) node[above] {$x$};%
\draw[-] (0,2.6692) -- (0,2.8692) (0.6923,2.6692) -- (0.6923,2.8692) (1.3846,2.6692) -- (1.3846,2.8692) (2.0769,2.6692) -- (2.0769,2.8692) (2.7692,2.6692) -- (2.7692,2.8692) (3.4615,2.6692) -- (3.4615,2.8692) (4.1538,2.6692) -- (4.1538,2.8692);%
\draw[-] (1.5721,2.6692) node[below] {$0$} (2.2644,2.6692) node[below] {$1$} (2.9567,2.6692) node[below] {$2$} (3.649,2.6692) node[below] {$3$} (4.3413,2.6692) node[below] {$4$} (0.8798,2.6692) node[below] {$-1$} (0.1875,2.6692) node[below] {$-2$};%
\draw[-Stealth] (1.3846,0) -- (1.3846,9);%
\draw[-] (1.5846,8.7845) node[right] {$y$};%
\draw[-] (1.4846,0) -- (1.2846,0) (1.4846,0.6923) -- (1.2846,0.6923) (1.4846,1.3846) -- (1.2846,1.3846) (1.4846,2.0769) -- (1.2846,2.0769) (1.4846,2.7692) -- (1.2846,2.7692) (1.4846,3.4615) -- (1.2846,3.4615) (1.4846,4.1538) -- (1.2846,4.1538) (1.4846,4.8462) -- (1.2846,4.8462) (1.4846,5.5385) -- (1.2846,5.5385) (1.4846,6.2308) -- (1.2846,6.2308) (1.4846,6.9231) -- (1.2846,6.9231) (1.4846,7.6154) -- (1.2846,7.6154) (1.4846,8.3077) -- (1.2846,8.3077);%
\draw[-] (1.2846,2.9567) node[left] {$0$} (1.2846,3.649) node[left] {$1$} (1.2846,4.3413) node[left] {$2$} (1.2846,5.0337) node[left] {$3$} (1.2846,5.726) node[left] {$4$} (1.2846,6.4183) node[left] {$5$} (1.2846,7.1106) node[left] {$6$} (1.2846,7.8029) node[left] {$7$} (1.2846,8.4952) node[left] {$8$} (1.2846,2.2644) node[left] {$-1$} (1.2846,1.5721) node[left] {$-2$} (1.2846,0.8798) node[left] {$-3$} (1.2846,0.1875) node[left] {$-4$};%
\draw[draw=none,fill=pink,fill opacity=0.6] (1.0391,2.2534) -- (1.0451,2.2895) -- (1.1113,2.6794) -- (1.1776,3.0566) -- (1.2438,3.4211) -- (1.3101,3.773) -- (1.3763,4.1122) -- (1.385,4.1542) -- (1.4094,4.1547) -- (1.4425,4.1587) -- (1.4757,4.1658) -- (1.5088,4.1761) -- (1.5419,4.1896) -- (1.575,4.2062) -- (1.6082,4.226) -- (1.6413,4.249) -- (1.7075,4.3045) -- (1.7738,4.3726) -- (1.84,4.4534) -- (1.9063,4.5469) -- (2.0388,4.772) -- (2.1713,5.0477) -- (2.3038,5.3742) -- (2.4363,5.7514) -- (2.5688,6.1793) -- (2.7013,6.6579) -- (2.8338,7.1872) -- (2.9663,7.7672) -- (3.0988,8.398) -- (3.1151,8.4804) -- (3.1319,8.4804) -- (3.165,8.4772) -- (3.1981,8.4709) -- (3.2312,8.4614) -- (3.2644,8.4487) -- (3.2975,8.4329) -- (3.3306,8.4139) -- (3.3637,8.3917) -- (3.43,8.3378) -- (3.4962,8.2712) -- (3.5625,8.192) -- (3.6287,8.1001) -- (3.7612,7.8783) -- (3.8937,7.6057) -- (4.0262,7.2824) -- (4.1536,6.923) -- (4.1272,6.7643) -- (4.0562,6.351) -- (3.9852,5.9523) -- (3.9142,5.5682) -- (3.8432,5.1986) -- (3.7722,4.8435) -- (3.6302,4.1772) -- (3.4882,3.5691) -- (3.3462,3.0192) -- (3.2041,2.5277) -- (3.0621,2.0943) -- (2.9201,1.7193) -- (2.7781,1.4025) -- (2.6361,1.1439) -- (2.5651,1.0365) -- (2.4941,0.9437) -- (2.4231,0.8654) -- (2.3521,0.8017) -- (2.3166,0.7753) -- (2.2811,0.7525) -- (2.2456,0.7334) -- (2.2101,0.7179) -- (2.1746,0.7061) -- (2.1391,0.6979) -- (2.1036,0.6933) -- (2.068,0.6924) -- (2.0325,0.6952) -- (1.997,0.7015) -- (1.9615,0.7115) -- (1.926,0.7252) -- (1.8905,0.7425) -- (1.855,0.7634) -- (1.8195,0.788) -- (1.784,0.8162) -- (1.713,0.8836) -- (1.642,0.9655) -- (1.571,1.062) -- (1.5,1.1731) -- (1.358,1.4389) -- (1.216,1.763) -- (1.074,2.1453)--cycle;%
\draw[blue, line width=0.8pt] (0,6.9231) -- (0.1243,6.4483) -- (0.2485,6.0182) -- (0.3728,5.6327) -- (0.497,5.2918) -- (0.6213,4.9954) -- (0.7456,4.7437) -- (0.8698,4.5366) -- (0.932,4.4498) -- (0.9941,4.3741) -- (1.0562,4.3096) -- (1.1183,4.2563) -- (1.1805,4.214) -- (1.2115,4.1971) -- (1.2426,4.183) -- (1.2737,4.1716) -- (1.3047,4.1631) -- (1.3358,4.1573) -- (1.3669,4.1543) -- (1.3979,4.1541) -- (1.429,4.1567) -- (1.4601,4.1621) -- (1.4911,4.1702) -- (1.5222,4.1812) -- (1.5533,4.1949) -- (1.5843,4.2115) -- (1.6154,4.2308) -- (1.6775,4.2778) -- (1.7396,4.3359) -- (1.8018,4.4052) -- (1.8639,4.4857) -- (1.9882,4.68) -- (2.1124,4.919) -- (2.2367,5.2025) -- (2.3609,5.5307) -- (2.4852,5.9035) -- (2.6095,6.3209) -- (2.7337,6.7829) -- (2.858,7.2895) -- (2.9822,7.8407) -- (3.1065,8.4365) -- (3.1686,8.7511) -- (3.2161,9);%
\draw[-] (3.4615,8.8269) node[blue] {$C_h$};%
\draw[red, line width=0.8pt] (0,6.9231) -- (0.0621,6.5559) -- (0.1243,6.1998) -- (0.1864,5.8549) -- (0.2485,5.5212) -- (0.3107,5.1986) -- (0.3728,4.8871) -- (0.497,4.2977) -- (0.6213,3.7528) -- (0.7456,3.2526) -- (0.8698,2.797) -- (0.9941,2.386) -- (1.1183,2.0196) -- (1.2426,1.6978) -- (1.3669,1.4206) -- (1.4911,1.188) -- (1.6154,1) -- (1.6775,0.9227) -- (1.7396,0.8566) -- (1.8018,0.8017) -- (1.8639,0.7579) -- (1.895,0.7401) -- (1.926,0.7252) -- (1.9571,0.713) -- (1.9882,0.7037) -- (2.0192,0.6971) -- (2.0503,0.6933) -- (2.0814,0.6923) -- (2.1124,0.6941) -- (2.1435,0.6987) -- (2.1746,0.7061) -- (2.2056,0.7162) -- (2.2367,0.7292) -- (2.2678,0.7449) -- (2.2988,0.7634) -- (2.3609,0.8088) -- (2.4231,0.8654) -- (2.4852,0.9331) -- (2.6095,1.102) -- (2.7337,1.3154) -- (2.858,1.5735) -- (2.9822,1.8762) -- (3.1065,2.2235) -- (3.2308,2.6154) -- (3.355,3.0519) -- (3.4793,3.533) -- (3.6036,4.0587) -- (3.7278,4.629) -- (3.7899,4.9309) -- (3.8521,5.244) -- (3.9142,5.5682) -- (3.9763,5.9035) -- (4.0385,6.25) -- (4.1006,6.6076) -- (4.1627,6.9764) -- (4.2249,7.3564) -- (4.287,7.7475) -- (4.3491,8.1497) -- (4.4112,8.5632) -- (4.4734,8.9877) -- (4.4751,9);%
\draw[-] (2.7692,1.3846) node[right,red] {$C_f$};%
\draw[green, line width=0.8pt] (0.6924,0) -- (0.7456,0.3687) -- (0.8077,0.7885) -- (0.8698,1.1971) -- (0.932,1.5946) -- (0.9941,1.9809) -- (1.0562,2.3561) -- (1.1183,2.7201) -- (1.1805,3.0729) -- (1.2426,3.4147) -- (1.3047,3.7452) -- (1.3669,4.0646) -- (1.4911,4.67) -- (1.6154,5.2308) -- (1.7396,5.7469) -- (1.8639,6.2185) -- (1.9882,6.6454) -- (2.1124,7.0278) -- (2.2367,7.3655) -- (2.3609,7.6586) -- (2.4852,7.9071) -- (2.6095,8.1111) -- (2.6716,8.1963) -- (2.7337,8.2704) -- (2.7959,8.3333) -- (2.858,8.3851) -- (2.9201,8.4257) -- (2.9512,8.4418) -- (2.9822,8.4552) -- (3.0133,8.4657) -- (3.0444,8.4735) -- (3.0754,8.4785) -- (3.1065,8.4807) -- (3.1376,8.4801) -- (3.1686,8.4767) -- (3.1997,8.4705) -- (3.2308,8.4615) -- (3.2618,8.4498) -- (3.2929,8.4353) -- (3.324,8.4179) -- (3.355,8.3978) -- (3.4172,8.3492) -- (3.4793,8.2895) -- (3.5414,8.2186) -- (3.6036,8.1365) -- (3.7278,7.939) -- (3.8521,7.6969) -- (3.9763,7.4101) -- (4.1006,7.0787) -- (4.2249,6.7028) -- (4.3491,6.2822) -- (4.4734,5.817) -- (4.5976,5.3072) -- (4.7219,4.7528) -- (4.8462,4.1538);%
\draw[-] (2.0769,7.6154) node[green] {$C_k$};%
\end{scope}%
\end{tikzpicture}%
