Please do this in C language :)

3.21 Remove gray from color (RGB) image Summary: Given integer values for red, green, and blue, subtract the gray-level from each value. Computers represent color by combining the sub-colors red, green, and blue (RGB). Each sub-color's value can range in intensity from 0 to 255. Thus (255, 0, 0) is bright red; (130,0,130) is a medium purple; (0, 0, 0) is black; (255, 255, 255) is white; and (50, 50, 50) is a dark gray. (130, 50, 130) is a faded purple, due to the (50, 50, 50) gray part. (In other words, equal amounts of red, green, and blue yields gray.) Given values for red, green, and blue, remove the gray part. Ex: If the input is: 130 50 130 the output is as follows and includes a newline at the end: 80 O 80 Hint: The gray-level is the smallest value among the three sub-colors. Find this value and then subtract it from all three values, thus removing the gray-level. Note: This page provides a color mixer widget where you can convert RGB values into colors