(c) If the flow downstream of a shock is sonic and is at an angle to the shock of 30, then determine the upstream Mach number and the deflection angle s. [12 marks) (d) The same body shape subsequently flies faster, while still forming an oblique shock at the tip of the body. Explain with reasoning whether the angle the shock makes with the upstream flow is greater, less than, or the same as in question 2(c). (4 marks)