A wedge A of negligible w eight is to lie driven between two 100-lb blocks B and C resting...

A wedge A of negligible w eight is to lie driven between two 100-lb blocks B and C resting on a horizontal surface. Knowing that the coefficient of static friction at all surfaces of contact is 0.35, determine the smallest force P required to start moving the wedge (a) if the blocks are equally tree to move, (b) if block C is securely bolted to the horizontal surface.