Two different types of books have to be stacked in the shelf of a library. The first type of book…

Two different types of books have to be stacked in the shelf of a library. The first type of book weighs 1 kg and has a thickness of 6 cm. The second type of book weighs 1.5 kg and has a thickness of 4 cm. The shelf is 96 cm long and can support a maximum weight of 21 kg. How should both the types of books be placed in the shelf to include the maximum number of books? Formulate a Linear Programming Problem and solve it graphically.