12.28 A total-pressure probe is placed in a supersonic wind tunnel where T =530 R and M =2 0. A normal shock stands in front of the probe. Behind the shock, M2 =0 577 and p2 =5 76 psia. Find

(a) the downstream stagnation pressure and stagnation temperature and

(b) all fluid properties upstream from the shock. Show static and stagnation state points and the process path on a Ts diagram.