$\mathrm{K}$ to $\mathrm{L}$ isobaric process, volume increases with increase in temperature i.e., Heating
$\mathrm{L}$ to $\mathrm{M}$ isochoric process, pressures decreases with decrease in temperature i.e., cooling
$\mathrm{M}$ to $\mathrm{N}$ isobaric process, volume decreases with decrease in temp i.e., cooling
$\mathrm{N}$ to $\mathrm{K}$ isochoric process, pressures increases with increase in temperature i.e., heating