An ideal monatomic gas is taken through the cycle in the PV diagram. (a) If there are

Question:

An ideal monatomic gas is taken through the cycle in the PV diagram.
(a) If there are 0.0200 mol of this gas, what are the temperature and pressure at point C? (b) What is the change in internal energy of the gas as it is taken from A to B?
(c) How much work is done by this gas per cycle?
(d) What is the total change in internal energy of this gas in one cycle?