while each heavy-duty cart requires 12 hours for the production and 3 hours for the finishing touches. The maximum hours available per week for the production and finishing touches are 180 and 30 hours respectively. What combinations of carts can be made each week sA carpenter makes standard push carts (x) and heavy-duty push carts (y). each standard cart requires 9 hours for the production and 1 hour for the finishing touches o as not to exceed the number of hours available in the production and finishing stages per week?