8. (8 points) Given functions f(x) =(4-x)x, and g(x) =0, graph the functions and find the exact area of the region bounded by the graphs (Please leave the answer in exact form). HNWI -6 -5 -4 -3 -2 -1 9 4 56 8) 9. (10 points) Differentiate and simplify the following: a) y = Guz sec' (nx) 9a) b) y= - 9b)