During a certain summer thunderstorm, the temperature drops and then rises again. The rate of change of the temperature during the hour and a half after the storm began is given by t(h) = 9.32/73 15.33/72 + 17.28h 9.91 where output is measured in F per hour and h is the number of hours since the storm began. (a) Calculate the average rate of change of temperature from 0 to 1.5 hours after the storm began. (Round your answer to three decimal places.) F per hour (b) If the temperature was 90F at the time the storm began, what was the average temperature during the first 1.5 hours of the storm? (Round your answer to three decimal alaces.) F