Expand 1025 mole of an ideal monatomic gas initially at 547

Question

Solve the all parts of given problem:

Problem: Expand 1.025 mole of an ideal monatomic gas initially at 5.47 kPa and 642 K from initial volume Vi = 1.00 m3 to final volume Vf = 2.00 m³. At any instant during the expansion, the pressure p and volume V of the gas are related by p = 5.47 exp[(Vi - V)/a], with p in kilopascals, Vi and V in cubic meters, and a = 1.00 m³.

Part A: What is the final pressure of the gas?

Part B: What is the final temperature of the gas?

Part C: How much work is done by the gas during the expansion?

Part D: What is the change in entropy of the gas during the expansion?

Please give me an explanation for above problem.