Consider the following Prolog program:

box$($yellow$,$ hotweels$).$ box$($yellow$,$ puzzle$).$ box$($red$,$ dress$).$ box$($red$,$ shoes$).$ box$($blue$,$ book$).$

addressed$\_$to$($yellow$,$ alex$).$ addressed$\_$to$($blue$,$ alex$).$ addressed$\_$to$($red$,$ becky$).$

addressed$\_$to$($green$,$ chris$).$

gift$($Person$,$ Gift$)$ :$-$ addressed$\_$to$($Color$,$ Person$),$ box$($Color$,$ Gift$).$

no$\_$gift$($Person$)$ :$-$ addressed$\_$to$($Color$,$ Person$),$ not box$($Color$,$ Gift$).$

$($a$)$ What is the first value of X returned by the goal gift$($alex$,$ X$)?$

$($b$)$ Which person does not receive a gift? That is$,$ what is the value of X returned by the goal

no$\_$gift$($X$)?$