3. A gas undergoes two processes. In the first, the volume remains constant at 0.200 m and the pressure increases from 2.00x 10" Pa to 5.00 x 10" Pa. In the second, the volume is compressed to 0.120 mat a constant 5.00 x 10 Pa pressure. a. Sketch both processes in a PV diagram. b. Find the total work done by the gas during both processes