#include #include #include #include int value = 0; void *runner(void *param); int main() { int pid; pthread_t tid; pthread_attr_t attr; pid = fork(); if (pid == 0) { pthread_attr_init(&attr); pthread_create(&tid,&attr,runner,NULL); pthread_join(tid,NULL); printf("A: value = %d ", value); } else if (pid > 0) { wait(NULL); printf("B: value = %d ", value); } } void *runner(void *param) { value = 5; pthread_exit(0); } Given the above code, answer the following three questions and one modification of the code. 1. What does this program output at A: and B:? 2. Mark each line of code in the program as either (1) executed by parent process, (2) executed as child process, (3) executed by a new thread spawned by the parent or (4) executed by a thread spawned by the child process.