A block is released from rest at the top of a frictionless in- clined plane 16 m long. It reaches the bottom 4.2 s later. A second block is projected up the plane from the bottom at the instant the first block is released in such a way that it returns to the bottom simultaneously with the first block. (a) Find the acceleration of each block on the incline. (b) What is the ini- tial velocity of the second block? (c) How far up the incline does it travel? You can assume that both blocks experience the same acceleration.