The walls in a 12'×15' room are 8' high. The room has 2 doors on wall one that measures 3'×6
' feet each and 1 window on wall two measuring 3'×4''. If a gallon of paint covers 400ft^{2} , how much paint is needed to paint the 4 walls. Find area of wall 1,2,3,4. and total area and amount of paint