Awoodworking artist makes two types of carvings: type x and type y. he spends 3 hours making each type x carving and 2 hours making each type y carving, and he can spend up to 36 hours each week making carvings. his materials cost him $4 for each type x carving and $5 for each type y carving, and he must keep his weekly cost for materials to $100 or less. if x is the number of type x carvings he makes in a week and y is the number of type y carvings he makes in a week, which of the following systems of inequalities models this situation?