Consider the following function.

Suppose fun is used in the following stub:

$i$:$=8$;

sum$1$ :$=(\frac{i}{2})+$ fun$(i)$;

$j$:$=10$;

sum$2$ :$=$ fun $(j)+(\frac{j}{2})$;

a$.$ What are the values of sum$1$ and sum$2$ if the operands in the expressions are evaluated from

left to right?

b$.$ What are the values of sum$1$ and sum$2$ if the operands in the expressions are evaluated from

right to left?

Note that the parameter $k$ is passed by reference $($i$.$e$.,$ its address is passed to the function$).$