$($Please show work and steps. Circle$/$box final answers$)$

$5-$cm$-$diameter pipe. Air enters the pipe at M$=2\mathrm{.}5,$ stagnation

temperature $300$ K $,$ and static pressure $0\mathrm{.}5$ atm $,$ and leaves the pipe at M$=1\mathrm{.}5.$ Assume that

$()/($bar$)($f$)=0\mathrm{.}002$ and that the flow is insulated.

aM$=1$ at the exit?