Hii I need help ASAP - 100 points!!! Energy and Enthalpy Changes, Heat and Work -- Monatomic Ideal Gas
*See picture

2.00-mol of a monatomic ideal gas goes from State A to State D via the path A→B→C→D:
State A PA=10.0atm, VA=10.00L
State B PB=10.0atm, VB=7.00L
State C PC=22.5atm, VC=7.00L
State D PD=22.5atm, VD=21.50L

1. Assume that the external pressure is constant during each step and equals the final pressure of the gas for that step.

Calculate q for this process

2. Calculate w for this process.

3. Calculate ΔE for this process

4. Calculate ΔH for this process.

*If you can explain the steps great! I would really appreciate it, if not just the answers are also fine