For Problems 21-25, a monatomic ( AU = ; (P,V, - P:Vi) ) is taken through the heat engine shown in the figure below. 2.4 x 106 b. P (Pa) Isothermal 8 x 105 a 6 x 105 C Isothermal 2 x 105 O 0.001 0.004 V (m3) Problem 21: What is Wnet, the net work done by the gas in this heat engine? a. 2218.1 J b. 3218.1 J . 4218.1J d. 5218.1J Problem 22: What is Qh, the heat flowing into the gas for this heat engine? a. 2727.1 J b. 3727.1 J c. 4727.1 J d. 5727.1 J Problem 23: What is Qc, the heat leaving the gas for this heat engine? a. -2509.0 J b. -3509.0 J c. -4509.0 J d. -5509.0 J Problem 24: What is the efficiency of this heat engine? a. 38.7% b. 48.7% c. 58.7% d. 68.7% Problem 25: What is the efficiency of a Carnot engine operating at the minimum and maximum temperatures for this heat engine? a. 36.7% b. 46.7% c. 56.7% d. 66.7%