Unemployment rate: = () = (5 cos (2t/))/(2+sin (2t/)) + 6 0 25))+ 6 0 25

Where time=t=0 represents January 1, 1985

GDP growth rate: = () = 5 ((2/)+ 5) + 2 0 25

Where time=t=0 represents January 1, 1985

7a. Critical numbers of G on the given interval for t rounded to the nearest whole number. 7b. Years on the given interval for t in which G is increasing and decreasing given in interval notation. 7c. All local extrema of G on the given interval for t written as an ordered pair with t given in years.