137. Solving a chemistry problem

At an initial temperature of 348, K, 1 mol of H2 according to the Carnot cycle first expands to a double volume isothermally, then expands to a quadruple initial volume adiabatically, then contracts isothermally to such a volume that, with subsequent adiabatic compression, it returns to its original position. Calculate the work of each part of the cycle and the efficiency of the cycle (ɣ = 1.4).