A 5.56 ft uniform board with a mass of 35.0 lb rests on two ladders at each end. On the board stands two people, one has a mass of 81 kg and stands 1.4 ft from the left. The other has a mass of 64.0 kg and stands 4.45 ft from the left. With how much force does each ladder push upward to support the board and people? Draw a vector diagram to help explain your answer.