How would you free the memory allocated by the following program? #include "alloc.h" #define MAXROW 3 #define MAXCOL 4 main() { int **p, i; p = (int **) malloc (MAXROW * sizeof (int *)); for ( i = 0; i < MAXROW ; i++) p[i] = (int *) malloc (MAXCOL * sizeof (int )); }