This problematic program should sum together all of the numbers in both input arrays and returns that sum as the output. $($assuming $$array$1$ and $$array$2$ have same length$)$ Which one of the following statements is a reasonable correction? $($Note: the correction may not fully fix the function$)$

function $[$totalSum$]=$ programToFix$($array$1,$array$2)$

totalSum $=1$; $?1$

n $=$ array$1$;

for i $=1$:$1$:n $?2$

totalSum $=$ array$1($i$)+$ array$2($i$)+$ totalSum; $?3$

end