Problem $1\mathrm{.}2.$ Heat absorbed by an ideal gas in various thermodynamic processes during a cyclic

transformation

One mole of an ideal gas undergoes the following cycle:

Figure $2$

Derive an expression for the heat added to the gas during this process $($one cycle$)$ using

only those parameters shown in Figure $2(p_1,p_2,T_1,T_2).$