Both challanges in swift code please $...$

enum ShapeDimensions $\{$

$//$ Square's associated value is the length of one side

case Square$($Double$)$

$//$ Rectangle's associated value defines its width and height

case Rectangle$($width: Double, height: Double$)$

func area$()->$ Double $\{$

switch self $\{$

case let $.$Square$($side$)$:

return side $*$ side

case let $.$Rectangle$($width: w$,$ height: h$)$:

return w $*$ h

$\}$

$\}$

$\}$