Last year, to honor doctors and nurses fighting COVID-19 in Greater New Orleans area, the US Airforce decided to fly bombers over the hospitals. Before takeoff, the bomber's jet engine makes a noise of 140 dB at a distance of 100 m and the frequency the jet engines on the ground is f;=250 Hz. The bomber flies with the speed of v=500 km/h from the west to the east above the EJGH (East Jefferson General Hospital) at the altitude of 3 km. The speed of sound v,=340 m/s. a) Find the loudness of bomber's noise in dB the nurse hears when the bomber is 4 km west of EJGH, right above her head and 4 km east of the EJGH. b) Find the frequency the nurse hears when the bomber is 4 km west of EJGH, right above

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