Pressure, Volume, and Temperature at a Point in a Thermodynamic Cycle

[Jeremy Stone]

Homework Statement

Question: https://imgur.com/a/8rUw1 Graph: https://imgur.com/a/Z1oBO

Homework Equations

Answer for Q1 (Just the formula) : https://imgur.com/a/uesqN

The Attempt at a Solution

I have realized that from 1-2, there is an increase in pressure, decrease in volume and increase in temperature I have realized that from 4-1, there is an decrease in pressure, constant volume and decrease in temperature I have realized that from 3-4, there is an decrease in pressure, increase in volume and decrease in temperature I am not sure where to go from here and what values to substitue in

 

[Evo]

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