Water from an atmospheric tank 15 m high is released through a 50 mm diameter hole located 3 m above the bottom. Tank diameter is 5 m. Assume the discharge coefficient is 0.61, find:

A) The maximum discharge velocity

B) The emptying time

C )Suppose the release has been stopped and the final liquid level in the tank is 8m. How long does it take for the liquid to leak out?