$[0\mathrm{.}25]$ Including the initial parent process, how many processes are created by the program shown in the question $7?$

$[0\mathrm{.}5]$ When a process creates a new process using the fork $0$ operation, which of the following states is shared between the parent process and the child process?

a$.$ Stack

b$.$ Heap

c$.$ Shared memory segments