Find the work done by gas going through a cyclic process shown in figure?

As cyclic process is in anticlockwise sense, hence work done by the gas should be negative and equal to area enclosedW = -π4(P2-P1)(V2-V1)W = -π4(4-1)×105×(20-5)    = -π4×3×15×105 = -225π2×103J      = -1125π kJ