A 70 g ball B dropped from a height h0 = 1.5 reaches a height h2 = 0.25 m after bouncing twice from identical 210-g plates. Plate A rests directly on hard ground, while plate C rests on a foam-rubber mat. Determine (a) the coefficient of restitution between the ball and the plates, (b) the height h1 of the ball's first bounce.

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