Please provide a detailed explanation regarding the writing of the function. Thank you!

(a) Write the function: float getDistance (float x1. float yl float x2, float y2) which computes and returns the distance between two coordinate points. (b) Given two circles, write a function of the form: int intersect (int cx1, int cyl int rl, int cx2 int cy2 int r2) which retums 1 if circle 1 intersects circle 2; otherwise, 0