Air at $523$ K and $613$ kPa enters a nozzle at a velocity of $139$ m$/$s and exits at $393$ m$/$s$.$ The inlet area of the nozzle is twice the outlet area. To determine:

$1)$ The specific enthalpy and temperature of the air at the exit.

$2)$ The specific volumes at the entrance and exit

$3)$ The air outlet pressure