Consider the below code,

public class Test $\{$

public static void sum $($int$[]$ nums$)$

$\{$

int sum $=0$;

for$(inti$ : nums$)$

$\{$

sum $+=i$;

$\}$

return sum;

$\}$

public static void main$($String$[]$ args$)$

$\{$

int$[]$ nums $=\{1,2,3,4,5\}$;

System.out.println$($sum$($nums$))$;

$\}$

$\}$

a$.$ What does the above program do$?$

b$.$ What is the output of the program, if it is correct. If it is not correct, what

is the issue?