n air$-$standard Otto cycle has a compression ratio of $9.$ At the beginning of compression,

p$1=95$ kPa and T$1=37$C$.$ The mass of air is $3$ g$,$ and the maximum temperature in the

cycle is $1020$ K$.$ Determine: $($Air R $=0\mathrm{.}287$ kJ$/$kg$$K$,$ $=1\mathrm{.}4$ and cv $=0\mathrm{.}718$ kJ$/$kg$$K$)$

$($a$)$ the heat rejection Q$41,$ in kJ$.(0\mathrm{.}245$ kJ$)$

$($b$)$ the net work, in kJ$.(0\mathrm{.}344$ kJ$)$

$($c$)$ the thermal efficiency. $(58\mathrm{.}5\%)$

$($d$)$ the mean effective pressure, in kPa. $(137\mathrm{.}9$ kPa$)$