The parameter weekday is True if it is a weekday, and the parameter vacation is True if we are on vacation. We sleep in if it is not a weekday or we're on vacation. Return True if we sleep in$.$

sleep$\_$in$($False$,$ False$)->$ True

sleep$\_$in$($True$,$ False$)->$ False

sleep$\_$in$($False$,$ True$)->$ True