A 2-in-thick slab is 10 in wide and 12 ft long. Thickness of the slab is reduced in three steps in a hot rolling operation. In each step, thickness is reduced by 25% and width increases by 3%. If the entry speed of the slab in the first step is 40 ft/min, and roll speed is the same for the three steps, determine (a) length and (b) exit velocity of the slab after the final reduction.