Consider a piston-cylinder with 0.5 kg of R-134a as saturated vapour at -10°C. It is compressed to a pressure of 500 kPa in a polytropic process with n = 1.5. Determine the work done during the process.

• A. -6.07 kJ
• B. -7.07 kJ
• C. -8.07 kJ
• D. -9.07 kJ