please explain how you got each value

What's the final value of variables after all statements are executed? double a[ ] = {10.0, 5.0, 5.0, 15.0, 1.0); double b[2] (3.5); double c-1.0, -4.1, 1.0; double *r, *q, pi void main (void) p = c. = &a [ 4] ; r11i *p += *&a [2]; p+ti a[0] =- a[2] =- c[2] =