Thermodynamics (Cyclic Process)

One mole of an ideal monatomic gas undergoes a cyclic process forming a rectangle on the P-V diagram with corners a(2 m^3, 300 N/m^2), b(5 m^3, 300 N/m^2), c(5 m^3, 100 N/m^2) and d(2 m^3, 100 N/m^2), traversed in the order a-b-c-d-a. The total heat supplied to the gas is: