Calculate the mass flow rate of air through a channel of square cross section of width L = 10 cm with Mach number M = 1.2, where the stagnation pressure is Po= 1.04 MPa and stagnation temperature is To = 323C. For air the specific gas constant is R = 287 J kg-1 K-1 and the specific heat ratio is y = 1.4. Give your answer to one decimal point in kg s-1. You may consider 0C = 273 K.