(1) A nacelle is designed to have a free Mach number of 0.4 at 1 km elevation in a hot day (To-305.61 K and Po-89.88 kPa). If the mass flow rate at take-off is 350 kg/s, determine: a. The engine inlet size in such that the Mach number at the diffuser inlet is limited to a maximum of 0.8, b. The value of the additive drag, and c. The installed thrust if the uninstalled thrust is 20000 N and nacelle drag is 400 N.