$PV$ curve for the process whose $VT$ curve is

An ideal gas is taken around $ABCA$ as shown in the above $P-V$ diagram. The work done during a cycle is

A system goes from $A$ to $B$ via two processes $I$ and $II$ as shown in figure. If $\Delta {U_1}$ and $\Delta {U_2}$ are the changes in internal energies in the processes $I$ and $II$ respectively, then

An ideal gas is made to undergo the cyclic process shown in the figure below. Let $\Delta W$ depict the work done, $\Delta U$ be the change in internal energy of the gas and $Q$ be the heat added to the gas. Sign of each of these three quantities for the whole cycle will be (0 refers to no change)

In the following indicator diagram, the net amount of work done will be