What is the total work done in a cyclic process?

Which of the following graphs correctly represents the thermodynamic processes shown?

One mole of an ideal gas in initial state $A$ undergoes a cyclic process $ABCA$,as shown in the figure. Its pressure at $A$ is $P_0$. Choose the correct option$(s)$ from the following:
$(A)$ Internal energies at $A$ and $B$ are the same
$(B)$ Work done by the gas in process $AB$ is $P_0 V_0 \ln 4$
$(C)$ Pressure at $C$ is $\frac{P_0}{4}$
$(D)$ Temperature at $C$ is $\frac{T_0}{4}$

An enclosed ideal gas is taken through a cycle as shown in the figure. Then

$A$ thermodynamic system is taken through the closed cycle $PQRSP$ process as shown in the figure. The net work done by the system is ...... $J$.

The pressure versus temperature $(P-T)$ graph of an ideal gas is shown in the figure.