Exercise $1$ One important question about by$-$result parameter passing that was not mentioned is this: whfen does the language system compute the lvalue of the actual parameter? $($The Ivalue of the actual parameter is the memory location to which the final value of the formal parameter is written.$)$ You might have assumed that this would be computed, like a by$-$reference parameter, before the called method executes. But since it is not needed until the called method returns, its computation could be delayed until it is needed, like a by$-$name parameter. Ada does it the early way, while Algol $W$ does it at the last minute.

Here is an example that illustrates the difference:

For each of these two different interpretations of by$-$result parameter passing, explain what happens when $$ calls g $.$ In particular, say exactly what happens when any change is made to i or A $.$