need help with all parts

4. (15 points) 0.20 mol of an ideal diatomic gas is taken clockwise (abcda) around the cycle shown in the PV-diagram below. The curved line connecting points a and c is the 600 K isotherm and F; = 1 atm. P (atm) a Py T 600 K Fy b 2 Py o d c 4 Vil 20L 4oL (a) (3 points) Determine the temperature, in Kelvins, at points and d. (b) (6 points) Calculate the work done for each process, a+b, bc, cd, and da. Specify whether the work is being done ON the gas or BY the gas. (c) (3 points) Determine the heat flow for each process, ab, b=c, c=d, and da. Specify whether the heat is owing INTO the gas or OUT OF the gas. (d) (3 points) What is the efficiency of this heat engine? Compare this to the effi- ciency of a Carnot engine operating between the same high and low temperatures