The temperature of a patient during an illness is given by the function T(t) = -0.1t2 + 1.2t + 98.6, 0 ≤ t ≤ 12, Where T is the temperature, in degrees Fahrenheit, at time t, in days, after the onset of the illness.
(a) Graph the function using a graphing calculator.
(b) Use the MAXIMUM feature to determine at what time the patient's temperature was the highest. What was the highest temperature?