My major is Fire Protection Engineering

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i have a lot work about this major anyone can help me.

1- what amount of work will be accomplished in transporting 500 gallons (120,000 liters) of water 1,760 feet (1,500 meters ) ?

2- how many gallons ( liters ) of water could be contained in a 30*40*120 foot(10*12*4 meters ) rectangular storage tank ?

3- the circular clapper on the air side of a dry pipe sprinkler valve has a diameter of 10 inches ( 25 cm ). What force will be acting on this clapper due to an air pressure of 40 psi ( 3 bar ) ?

4- the circular clapper on the water side of a dry pipe sprinkler valve has a diameter of 4 inches ( 10 cm ). What force will be acting on this clapper due to a water pressure of 72 psi ( 5 bar ) ?

5- if a 180-pound (82 kg) man sits on a 5-pound ( 3 kg ) chair, and each of the 4 chair legs has a circular cross section with a 1-inch ( 2.5 cm ) diameter, What pressure is exerted on the floor by the chair ?

6- if a spherical storage tank holed 40,000 gallons ( 120,000 liters ) of water, what diameter must it have?