What are the values of pid at lines A, B, C, and D. (Assume that the actual pids of the parent and child are 2600 and 2603, respectively.) #include #include #include int main() { pid_t pid, pid1; pid = fork(); if (pid lt; 0) { fprintf(stderr, "Fork Failed"); return 1; } else if (pid == 0) { pid1 = getpid(); printf("child: pid printf("child: pid1 = = %d", pid); /* A */ %d",pid1); /* B */ } else { /* parent process */ pid1 = getpid(); printf("parent: pid = %d",pid); = /* C */ %d",pid1); /* D */ printf("parent: pid1 wait(NULL); } return 0; }