The College of Engineering has an emergency water tank that is cylindrical and 4 feet high. The tank is initially filled with water at 60F and has a 3-foot diameter opening to the atmosphere at the top. The outlet at the bottom of the tank with a diameter of 0.5 inches is opened and water begins to empty out of the tank. The average velocity of the water exiting the tank is gy Torricelli's law as v=(2gh)1/2, where h is the height of the water above the center of the outlet port and g is the acceleration due to gravity. Ignoring any water loss through the top opening, determine: a) how long it will take the water level to drop to 2 feet from the bottom; and b) how long it will take to drain the entire tank