Consider n moles of ideal gas, with constant volume specific heat cv, undergoing a cyclic process as follows: (i) initial state is po, vo, to; (ii) expansion to 2vo at constant pressure; (ii) isothermal expansion from 2vo to 4vo; (iv) constant pressure compression returns temperature to to; (v) isothermal compression, returning to initial state, po, vo. (a) find p, v, and t at the endpoints of these processes. (b) find au of the gas for the complete cycle. (c) find the work done on the gas, and the heat flow, in each process. (d) this cycle is a heat engine. the efficiency is defined as the net work done by the gas (sum of all 4 processes), divided by the total qin, where the latter quantity only includes those processes where the heatflow direction is into the gas. find the efficiency.