#8 answer both parts please

(7%) Problem 8: Suppose an oncoming ambulance moving at 135 km/h emits a steady 810-Hz sound from its siren. Patel, Simran - simran. patel@doane.edu @theexpertta.com - tracking id: 9N69-D3-16-42-9192-40025. In accordance with Expert TA's Terms of Service, copying this information to any solutions sharing website is strictly forbidden. so may result in termination of your Expert TA Account. A 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. fobs.i = 1 Hz Grade Summa Deductions Potential sin() cosO tan() 7 8 9 HOME Submissions cotan( asin( acos() E 4 5 6 Attempts remain (83% per attem atan() acotan() sinh() 2 3 detailed view cosh( tanh() cotanh() + 0 UND Degrees O Radians VO ACK SPACE CLEAR Submit Hint Feedback I give up! Hints: 0% deduction per hint. Hints remaining: 1 Feedback: 0% deduction per feedback. 4 50% Part (b) What frequency, in units of hertz, does she observe after the ambulance has passed