(2) in a cenain city the temperalure (in degrees Fahrenheit) t hours after Sam was approximated by me function _ 1115 T63) 30 + 193111 (5) Determine the temperature at 9 am. I ' Determine the temperature at 3 pm. i ' Find the average temperature during the period from 9 am lo 9 pm. L] (b) Using the method of u-substitution, 122 2)3 dz : ['5 u.) (in where u : [J (enter a function of 5:) (in : dz: (enier a function of 2:] a. :5 |(enter a number) 5 2 hi (enter a number) u) : ,7 (enter a funciion of u}. The value of the original integral is [:J