Suppose you want to write a source code lab3.c, as shown in the following. #include #include #include #include void print_i (void *ptr) ( } printf("1: I am \ "); sleep (1); printf("in i\ "); void* print_j (void *ptr) { printf("2: I am \ "); sleep (1); printf("in j\ "); int main() { pthread_t tl, t2