A tiny rock is thrown straight downward from a height of 325m. If it takes 6.00s to hit the ground, find (a) its initial speed, (b) its final speed just before striking the ground, (c) its equation of motion , and (d) the distance traveled during the last second. Place the origin at the starting point of the rock with the (+y) axis upward. Neglect air resistance, and let g = -9.81 m/s2