17. The hourly temperature at Portland, Oregon, on a particular day is recorded below. 1 A.M. 2 3 4 5 6 7 8 46 9 44 10 11 410 40 12 Noon 40 410 430 1 P.M. 46- 2 52 65 3 690 4 5 6 7 72 8 740 750 9 10 750 11 770 750 12 Midnight 740 70 620 550 510 48 a. Find the amplitude of a sinusoidal function that models this temperature variation. b. Find the vertical shift of a sinusoidal function that models this temperature variation. c. What is the period of a sinusoidal function that models this temperature variation? d. Use t = 0 at 5 P.M. to write a sinusoidal function that models this temp. variation. e. What is the model's temperature at 10 A.M.? Compare this to the actual value