Supersonic air flow, flowing around the convex angle ABC, rotates at an angle δ

Supersonic air flow, flowing around the convex angle ABC, rotates at an angle δ =15°. To turn the flow is moving parallel with the side AB with parameters P1 = 2*105 PA, T1= 400 K and W1 = 500 m/s. Find the pressure P2 , temperature T2 and flow velocity W2 after the turn. Find the boundaries of the centered rarefaction wave, that is, the angles of inclination of the first α1 and the last α2 Mach waves
Requirements: all answer including the equations and how to solve it

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