What is the output of following programs? Briefly explain your answer.

1. Program 1: # include void foo (int x) double a-100 double b-40; x- a*a int main int y= 20 foo (y); printf("%d", y); return 0; 2. Program 2: # include void foo (int *ptr) double a 10; double b-4; ptraa +4*b+5; imt main ( int y-20 foo(&y) printf("%d", y); return 0 3. Program 3: #include stdio.h int main double *ptr; double x; ptr&x; *ptr = 10.254575; printf(* printf(* x %0.2f ", *ptr=%f ', x); *ptr ) ; *ptr 10; printf(* x = %f , x); printf(* *ptr=%f ', *ptr ) ; (*ptr)++; printf(* x %0.4f ", x); printf(* *ptr= %0.4f ', *ptr); return 0; 4. Program 4: #include void foo (int *p, int *q) int int a=10; b-; *pbb+10*a; int i = 0, j int main () 2 foo(&i , &j); printf("%d %d ", i, j); getchar (O; return 0; 5. Program 5: #include