$P-V$ diagram of a cyclic process $ABCA$ is as shown in figure. Choose the correct statement

A diatomic gas, having $C_{p}=\frac{7}{2} R$ and $C _{ v }=\frac{5}{2} R ,$ is heated at constant pressure. The ratio $dU : dQ : dW :$

In a cyclic process, the internal energy of the gas

One mole of ideal gas taken through a cycle process with alternate isothermal and adiabatic curves. In $P-V$ diagram $AB, CD, EF$ are isothermal curves at the absolute temperature $T_1, T_2$ and $T_3$ respectively and $BC, DE$ and $FA$ are adiabatic curves respectively. If $\frac{{{V_B}}}{{{V_A}}} = 2,\,\frac{{{V_D}}}{{{V_C}}} = 2$ then for cycle is shown in figure four statements are being made given below. (Figure is not drawn on scale) 

Statement $1$ : Ratio of volumes $\frac{{{V_E}}}{{{V_F}}} = 4$

Statement $2$ : Magnitude of work done in isothermal compression $EF$ is $2RT_3\ ln\ (2)$

Statement $3$ : Ratio of heat supplied to gas in the process $AB$ to heat rejected by gas in process $EF$ is $\frac{{{T_1}}}{{2{T_3}}}$

Statement $4$ : Net work done by gas in the cycle $ABCDEFA$ is $(T_1 + T_2 – 2T_3) R\  ln\ (2)$ 

Find the number of correct statement $(s)$ given for the cyclic process followed by gas

In the figure given two processes $A$ and $B$ are shown by which a thermo-dynamical system goes from initial to final state $F.$ If $\Delta {Q_A}$ and $\Delta {Q_B}$ are respectively the heats supplied to the systems then