Determine area ratio between the exit and entrance of diffuser

Question

Air enters a diffuser with  velocity of 250 m/s and a temperature of 30 ⁰C. It leave s with a velocity of 90 m/s. Neglecting friction and heat transfer determine

1. Exit temperature
2. Exit pressure if the inlet pressure is 125 kPa and
3. Area ratio between the exit and entrance.

Will your answers change if there is friction present? Explain how.