In some wind tunnels the test section is perforated to suck out fluid and provide a thin viscous boundary layer. The test section wall in Fig. P3.33 contains 1200 holes of 5-mm diameter each per square meter of wall area. The suction velocity through each hole is Vs=8 m/s, and the test-section entrance velocity is V1=35 m/s. (Df=2.2 m, D0=2.5 m, Ds=0.8 m, L=4 m.) Assuming incompressible steady flow of air at 20°C, compute (a) V0, (b) V2, and (c) Vf, in m/s.