Consider the c program given below (on the next page). assume that all fork() and wait() calls complete successfully. answer the following questions: - (2 points) how many processes are created during the execution of this program (including the "parent" process)? - (2 points) draw the process hierarchy tree for this program. - (3 points) in which order did the processes in the hierarchy tree start and complete? why? explain your answer. - (3 points) which processes (among those in the hierarchy tree) will execute the line marked by "do computation". explain your answer. code for question 19: #include #include #include #include int main(void) { pid_t pid, pid2, pid3; int status, status2, status3; pid = fork(); if (pid == 0) {