A laboratory heat engine takes 2mol of monatomic ideal gas at initial pressure P0 and initial volume V0 through the following processes, in order:

i. isochoric heating from P0 to P1;

ii. isobaric expansion from V0 to V1;

iii. isochoric cooling from P1 to P0;

iv. isobaric compression from V1 to V0.

If P0 = 101000Pa, P1 = 404000Pa, V0 = 0.1m3 and V1 = 0.4m3,

Draw the PV diagram for this engine, labeling important features; and find the temperature of the gas at the start of the process.