9. (10 points) Given the function f(x)=x3- 5x+5 (a) Plot the function. (b) Make a guess what the average value of the function is between x = 0 and x = 2. (0) Compute the average value of the function between X = O and X =2. (d) Was your numerical average value guess close to your computed average value guess? (yes or no) 10. (10 points) The surface area of a cone with radius = r and height = h is expanding in such a way that r is increasing at 1 cmfmin. At what rate is the surface area increasing . an . when r = 10 cm and h is constant at 10 cm (E = 0)? (Be sure to include the correct units.) Note: The surface area of the cone is SA=7tr2+anr2+h2