HW#$7-2$ An ideal Otto cycle has a compression ratio of $10.$ At the beginning of the compression process, $P_1=90$ kPa,$T_1=27C,$ and $V_1=0\mathrm{.}004m^3.$ The maximum cycle temperature is $1127C.$ For each repetition of the cycle, using constant specific heats at room temperature, calculate effective pressure $($MEP$,$ kPa$).$