From the question we can deduct that the temperature is proportional to the volume of the gas, set:
P=CV
With P being pressure, V being the volume, and C being the constant of the gas.
A. Plug V=2 and P=125 into the equation:
125=C2
C=250
Therefore the relationship between P and V is:
P=250V
Plug P=325 into the equation:
325=250V
Multiply both sides of the equation by a factor of V:
325V=250
Divide both sides by 325:
V=250325=1013 (Unit Volume)
Done :D
B.
Plug V=10 into the equation:
P=25010=25 (Unit Pressure)
Done :D x2