1. How much work is done in a cycle by a system of gas in a cylinder, if the cylinder decreases in pressure from 2.0 ATM to 1.5 ATM while the piston is motionless, then the piston contracts the volume of the cylinder from 0.05 to 0.03 m cubed while the pressure stays at 1.5 ATM, the pressure is raised back to 2.0 ATM while the piston is motionless, and then the piston moves back, to increase the volume to 0.05 m cubed, while the pressure stays at 2.0 ATM. Answer in SI units and use the correct sign.