5.43 (10 pts) What does the following program do? #include 3 unsigned int mystery Cuns igned int a, unsigned int b): // function prototype 5 int main(void) printf("%s". "Enter two positive integers: unsigned int x: I/ first integer unsigned int y: // second integer scanf("Su%u". &x, &y); "); 12 13 14 15 II Parameter b must be a positive integer 16 to prevent infinite recursion 7 unsigned int mystery Cuns igned int a, unsigned int b) 18 printf("The result is %u ". mystery(x. y)); 20 21 // base case if 1b) C return a 23 24 25 26 else t I/ recursive step return a mysteryCa, b-1) ANS