Thermodynamics

Consider the following volume-temperature (V−T ) diagram for the expansion of 5 moles of an ideal monoatomic gas.

Considering only P−V work is involved, the total change in enthalpy (in Joule) for the transformation of state in the sequence X⟶Y⟶Z is _______.
[Use the given data: Molar heat capacity of the gas for the given temperature range, CV,m=12JK−1mol−1 and gas constant, R=8.3JK−1mol−1 ]