A tank is full of water. Find the work W required to pump the water out of the spout. (Use 9.8 m/s2 for g. Use 1000 kg/m3 as the weight density of water.)

A tank is full of water. Find the work (in ft-lb) required to pump the water out of the spout. Use the fact that water weighs 62.5 lb/ft3. (Round your answer to the nearest whole number.)
Suppose that 2 J of work is needed to stretch a spring from its natural length of 26 cm to a length of 44 cm.
(a)
How much work (in J) is needed to stretch the spring from 31 cm to 39 cm? (Round your answer to two decimal places.)
J
(b)
How far beyond its natural length (in cm) will a force of 35 N keep the spring stretched? (Round your answer one decimal place.)
cm