(10%) Problem 8: One day when the speed of sound in air is 343 m/s, a fire truck traveling at vs = 26 m/s has a siren which produces a frequency of f = 402 Hz. Randomized Variables VS = 26 m/s f = 402 Hz 4 50% Part (a) What frequency, in units of hertz, does the driver of the truck hear? fa = 1 Hz sin() cos() tan( 7 8 9 HOME cotan() asin() acos() E A 4 5 6 atan() acotan( sinh() 1 2 3 cosh() tanh() cotanh() + END .Degrees O Radians VO BACKSPACE DEL 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 an observer hear when the truck is moving away