$7-$Write a procedure that returns a list that contains only the last element of a giv$-$

en $($nonempty$)$ list. For example, $(($last$-$element $\text{'}($a $($b c $())($d e$)($f$)$ g$))$ returns $\text{'}g.$

Then, Manually trace your procedure with the provided example. Please study

provided examples in the lecture notes to learn how you should manually trace

our procedure.