If the following heat engine uses a monatomic gas

Question

Fill in the following table

Process W_s Q deltaU

1→2

2→3

3→1

Totals

I can't get the plot picture on here, but how would I go through solving this?

Answer 1

I doubt I can put a URL in here, but searching online I see a number of videos and links addressing the operation of a heat engine with a mono-atomic gas.