Sandra Robinson deposited $$2,700$ today in an account paying $6$ percent interest annually. $($Round intermediate calculations to $8$ decimal

places, e$.$g$.2\mathrm{.}51251245.)$

What would be the simple interest earned on this investment in $5$ years? $($Round final answer to $0$ decimal place, e$.$g$.150.)$

Simple interest on investment $

With annual compounding, how much interest on interest would Sandra earn in $5$ years? $($Round final answer to $2$ decimal places, e$.$g$.$

$15\mathrm{.}25.)$

Interest$-$on$-$interest $