$2.$ Using the following program, explain what the output will be at LINE A$,$ B$,$ C$,$ D and E$.$ Explain why you have $3$ different pids and why these process ids are different for each run. Note that getpid$()$ returns the process ID and getppid$()$ returns the parent process ID$.$ Use ps command to find the bash PID and compare it with the one you find. To get full mark show the print screen. Don$$t explain the code but explain what you understand from the screen. #include #include #include int main$()\{$ pid$\_$t pid, pid$1$; $2$ pid$1=$ getpid$()$; printf$("$Creator: pid$1=\%$d

$",$pid$1)$; $/*$ E $*//*$ fork a child process $*/$ pid $=$ fork$()$; if $($pid $<0)\{/*$ error occurred $*/$ fprintf$($stderr$,$ "Fork Failed"$)$; return $1$; $\}$ else if $($pid $==0)\{/*$ child process $*/$ pid$1=$ getpid$()$; printf$("$Child Process: Process ID $($pid$)$ : $\%$d

$",$pid$)$; $/*$ A $*/$ printf$("$Child Process: Process ID $($pid$)$ using getpid$()$: $\%$d

$",$pid$1)$; $/*$ B $*/$ printf$("$Child Process: Process ID $($pid$)$ using getppid$()$: $\%$d

$",$getppid$())$; $/*$ C $*\}$ else $\{/*$ parent process $*/$ pid$1=$ getpid$()$; printf$("$Parent Process: Process ID $($pid$)$ : $\%$d

$",$pid$)$; $/*$ D $*/$ printf$("$Parent Process: Process ID $($pid$)$ using getpid$()$ : $\%$d

$",$pid$1)$; $/*$ E $*/$ printf$("$Parent Process: Process ID $($pid$)$ using getppid$()$: $\%$d

$",$getppid$())$; $/*$ F $*/$ wait$($NULL$)$; $\}$ return $0$; $\}$