Consider an air$-$standard Otto cycle $($working fluid air, Cp$=1\mathrm{.}005$ kJ$/$kg K$,$ Cv$=0\mathrm{.}718$ kJ$/$kg K$,$ and R$=0\mathrm{.}287$ kJ$/$kg K$).$ The state of working fluid at the start of compression process is $101\mathrm{.}325$ kPa and $25$C$.$ The compression ratio is $9\mathrm{.}5.$ It is followed by the constant volume heat addition process in which $1950$ kJ$/$kg of heat is supplied. Calculate the following:

a$)$ The cycle efficiency $(\%).[4]$

b$)$ Maximum temperature of the cycle $($in K$).[4]$

c$)$ Heat rejection in the cycle $($kJ$/$kg$).[4]$