Donna Clark invested $$7,000$ at $11\%$ annual interest, and left the money invested without withdrawing any of the interest for $9$ years. At the end of the $9$ years, Donna withdrew the accumulated amount of money.

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$($For calculation purposes, use $5$ decimal places as displayed in the factor table provided.$)$

$($a$)$ What amount did Donna withdraw, assuming the investment earns simple interest?

The amount Donna withdrew

$ $$

$($b$)$ What amount did Donna withdraw, assuming the investment earns interest compounded annually? $($Round answer to $2$ decimal places, e$.$g$.25\mathrm{.}25.)$

The amount Donna withdrew

$