For part a$,$ I think the answer is $5.$ At leat from my understanding. If that is correct $($and if its not$)$ could you show the tree that explains how this we get this answer, I kind of understand the fork$()$ part i$\text{'}$m just a little confused on some parts of it$.$ As for part b$,$ I really have no idea what the answer could be or how I would find it$.$ Any help is appreciated.

pid$\_$t pid;

$/*$ one thread in the initial process pid $=$ fork$()$;

if $($pid $==0)\{$

$/*$ child process $*/$

fork$()$;

thread$\_$create$(...)$;

$\}$

fork$()$; $/*$ called by all threads

A fork call by a process $($or thread$)$ creates a child process. Since each newly created process does not call exec$()$ after forking, a child process will duplicate all parent$$s threads. Assume initially the parent process is single$-$threaded. Please show how your answers are derived, not just numbers. Please answer the following questions:

a$.$ How many new processes are created, not including the initial parent process? b$.$ How many new threads are created not including the original thread in the initial parent process?