Consider the JavaScript code segment below.

function mystery$($num$1,$ num$2)\{$

var total $=0$

for $($var i $=0$; $1<$ num$1$; i$++)\{$

total $=$ total $+$ num$2$;

$\}$

return total;

$\}$

document.write$($mystery$(2,3)+"$

$")$;

document.write$($mystery$(4,5)+"$

$")$;

a$.$ What will be displayed by document.write$($mystery$(2,3)+"$

$")$; $?$

b$.$ What will be displayed by document.write$($mystery$(4,5)+"$

$")$; $?$

c$.$ Briefly explain the purpose of the function mystery.

LABEL YOUR ANSWERS a$,$ b$,$ and c$.$