A marine diesel engine is modeled using an air$-$standard Diesel cycle $($variable specific heats$)$

with the following specifications:

$V1=1\mathrm{.}36$ liters

displacement volume of $1\mathrm{.}27$ liters,

cutoff ratio of $1\mathrm{.}9$

The air's initial compression state is given by $p1=101\mathrm{.}3$kPa,$T1=27C.$

a$)$ Draw by hand T$-$s and p$-$v diagram and indicate where heat is added and rejected.

b$)$ Calculate the engine's net work per cycle, in kJ $,$ along with the associated thermal efficiency.