please explain how b = 1587.6N

3) A 65.0 kg diver stands at the end of a 32.0 kg diving board as shown. We will answer several questions to calculate the magnitude of the vertical force exerted by the hinge on the board. S Antion 157 XEm Fhinge Jin a) There are four forces acting on the board. Draw a free body diagram and indicate each one. Refer to the force that the hinge (the circle on the far left) exerts as Fringe and the force that the middle support exerts as F1- Axis b) The hinge is on the far left. Calculate the torque about the hinge due to each force, set the sum of the torques equal to zero, and use this to calculate F1. 2T = 0 (0) Fringe + 15) Fillj -it's SMband , () - LMperson (1 ) = 0 ( 5 ) Fi - ()Miboad9 - LMperson g = ( =) [ = 1587. 6 N c) The sum of the forces is also zero. Use this to calculate Fringe- F, - thinge - Mboard g- Mpersong = O= thinge = 6