The diving board shown in the figure below has a mass of 28 kg and its center of mass is at the board's geometrical center.
Determine the forces that support posts 1 and 2 (separated by 1.4 m) exert on the board when a 60-kg person stands on the end of the board 2.8 m from support post 2. Use positive values for the upward forces and negative values for the downward forces.