Hourly temperature at portland, oregon, on a particular day is recorded below. 1 a. m. 2 3 4 5 6 7 8 9 10 11 12 noon 46 44 43 41 40 40 41 43 46 52 65 69 1 p. m. 2 3 4 5 6 7 8 9 10 11 12 midnight 72 74 75 75 77 75 74 70 62 55 51 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 models temperature at 10 a. m.? compare this to the actual value?