please help me with my friend's question, for the work i got 3.7kj, heat i got -3.7kj, and change in entropy is -11.5. one of these answers i got is correct, which one is wrong?

Challenging Problem: This question is designed to help you integrate knowledge. A piston-cylinder applies a constant pressure of 5.00 bar to spontaneously compress 1.00 moles of an ideal gas isothermally at 320K from a volume of 0.20m3 to 0.050m3. Calculate a) the work done on the gas to compress it units kJ ( 2 sig figs) b) the heat for the process units kJ ( 2 sig figs) c) change in entropy for the gas units J/K (3 sig figs)