$1.$ Ben Lieber is a waiter at Harbor House, where he receives a weekly wage of $$80$ plus tips for a $40-$hour workweek. Lieber$$s weekly tips usually range from $$280$ to $$400.$

a$)$ Under the Fair Labor Standards Act, the minimum amount of wages that Lieber must receive for a $40-$hour workweek is$?$

b$)$ Since Harbor House is in violation of the FLSA, the additional amount it should pay Lieber each week to meet the minimum wage requirement for a tipped employee is$?$