The 1.2-kg slider of the system of Prob. 3/141 is released from rest in position A and s...

The 1.2-kg slider of the system of Prob. 3/141 is released from rest in position A and slides without friction along the vertical-plane guide. Determine the normal force exerted by the guide on the slider (a) just before it passes point C, (b) just after it passes point C, and (c) just before it passes point E.