A very large vat of water has a hole 1.00 cm in diameter located a distance 1.80

Question:

A very large vat of water has a hole 1.00 cm in diameter located a distance 1.80 m below the water level.
(a) How fast does water exit the hole?
(b) How would your answer differ if the vat were filled with gasoline?
(c) How would your answer differ if the vat contained water, but was on the Moon, where the gravitational field strength is 1.6 N/kg?