3) The average daily high temperature of Philadelphia, PA tyears from now is predicted to be able to be modeled by the function P(t) = 04.25 + 0.004: + 1n ( 11:\":4) where PO?) is in degrees Fahrenheit for t 2 5. a) Find the average high temperature 65 years from now. {2 pts} 13} Find the rate of change of the average high temperature 80 years from now and include the appropriate units in your answer. Round your answer to 4 decimal places. {10 pts} 4) Find all values of x for which the slope of the line tangent to the function f (x) = is [x2 + 4x 45)5 is horizontal. {12 pts}