Need help solving these two questions

are done by the gas. Find the number of moles of the gas 17 Four moles of an ideal gas are carried through the cycle ADCDA of figure 17.6. If TD = 100 K, TAC = TA = Tc = 200 K, TB = 400 K, PA = 0.500 X 10 Pa, and pr 2.50 X 10* Pa, use the ideal gas equation to determine the volumes VA and Vp. *18. In problem 17 find the work done, the heat lost or absorbed, and the change in internal energy of the gas for the paths (a) AB, (b) BC, (c) CD, (d) DA, and (e) ABCDA