#8answer both parts please

(7%) Problem 8: Suppose an oncoming ambulance moving at 125 km/h emits a steady 775-Hz sound from its siren. Forbes, David - david.forbes@doane.edu @theexperita.com - tracking id: 9N69-72-B9-45-AB7A-40025. In accordance with Expert TA's Terms of Service, copying this information to any solutions sharing website is strictly forbidden. D so may result in termination of your Expert TA Account. D 4 50% Part (a) What frequency, in units of hertz, is received by a person watching the oncoming ambulance? The speed of sound on this day is 345 m/s. Grade Summary fobs, = 1 Hz Deductions Potential sin() cos tan() 7 8 9 HOME Submissions cotan( asin acos() 4 5 6 Attempts remain (83% per attemp atan() acotan() sinh() 2 3 detailed view cosh( tanh() cotanh() + 0 END O Degrees O Radians VO BACKSPACE CLEAR Submit Hint Feedback I give up! Hints: 0% deduction per hint. Hints remaining: 1 Feedback: 0% deduction per feedback. A 50% Part (b) What frequency, in units of hertz, does she observe after the ambulance has passed