(i) 6.50 moles of helium gas (He) is initially held in a 0.0250 m3 cylinder that has a moveable piston. The gas is initially at 20.0◦C. (ii) The gas then expands isothermally to a final volume of 0.0450 m3. (iii) The gas then undergoes an isobaric compression back to its original volume. Finally, the pressure of the gas is increased isochorically back to its original state (i). Assume the gas is ideal