Question $3[$Points $5]$ Modify and run the program shown below in the following way. There is

an array of $20$ elements defined in the program. The elements of the array are:

$[2018161412108642-20-18-16-14-12-10-8-6-4-2].$ Thread $1$ adds the first four

elements $[20,18,16,14],$ Thread $2$ adds the next four elements $[12,10,8,6],...,$ Thread $5$ adds

the last four elements $[-8,-6,-4,-2].$ Finally, the sum of all the $20$ elements is printed by the

main program. The parent must wait for all threads to complete before printing the output. Run

and show the output.

include

#include

#include

#define NUM$\_$THREADS $3$

int counter$=1$;

void $*$PrintHello$($void $*$threadid$)$

$\{$

counter $=2*$counter$+($int$)$ threadid;

printf$("$

Thread Id: $\%$d Counter: $\%$d

$",$ threadid, counter$)$;

pthread$\_$exit$($NULL$)$;

$\}$

int main$($int argc, char $*$argv$[])$

$\{$

pthread$\_$t threads$[$NUM$\_$THREADS$]$;

int rc$,$ t;

for$($t$=0$;t