Six moles of an ideal gas performs a cycle shown in figure. If temperatures are $T_A=600 \mathrm{K},T_B=800 \mathrm{K}$ and $T_D=1200 \mathrm{K}$, the temperature at point $\mathrm{C}\left(\mathrm{in} \mathrm{K}\right)$, is $40 n$. Value of $n$, is

A sample of gas is going through cyclic process, work-done by gas is

Three moles of an ideal gas undergo a cyclic process shown in figure. The work done by the gas during the process is

A monoatomic gas (one mole) is taken through process $A\to B$ as shown in figure. Find average molar heat capacity for the process.