A quantity of air is taken from state a to state b along a path that is

Question:

A quantity of air is taken from state a to state b along a path that is a straight line in the pV-diagram
(a) In this process does the temperature of the gas increase, decrease, or stay the same? Explain.
(b) If Va= 0.0700m3, Vb = 0.1100m3, Pa = 1.00 X 105 Pa, and Pb = 1.40 X105 Pa, what is the work W done by the gas in this process? Assume that the gas may be treated as ideal