Consider the C program below. (For space reasons, we are not checking error return codes, so assume that all functions return normally.) Assume all processes run to normal completion. #include #include #include #include #include main(){if(fork() == 0){if (fork() == 0){printf("3");}} else{if(fork() == 0){printf("1"); exit(0);} printf("2");} printf("0"); return 0;}