A diver of mass 68 kg stands at the end of a uniform diving board of mass 16 kg and length 4:5 m. The board is attached by two pedestals that are 1:5 m apart, as shown in the gure. (a) Sketch a force diagram showing all external forces acting on the system diver plus diving board. (b) Calculate the magni- tudes of the forces exerted by the pedestals on the diving board. (c) For each pedestal specify whether it is under tension or compression.