\fA stone thrown upward from the top of a 88 ft cliff at 168 ft/s eventually falls to the beach below. (For this problem take the acceleration due to gravity to be 9 = 32 ft / s2; take upwards to be a positive direction.) (a) How long does the stone take to reach its highest point? time = A (include units) (b) What is its maximum height? height = 9'. (include units) (c) How long before the stone hits the beach? time = y', (include units) (d) What is the velocity of the stone on impact? velocity = i, (include units) If oil leaks from a tank at a rate of r(t) gallons per minute at time t, what does So r(t) dt represent? O A. The number of gallons remaining in the tank after the first two hours have passed. O B. The rate at which the oil leaks out after two hours have passed. O C. The number of gallons of oil that leaked from the tank in the first two hours. D. The average rate at which oil leaked from the tank during the first two hours