9. (a) Find the average value of f(x) on the given interval. (Similar to 4.7 #19-36) f(x) = x/, 1 x 8 (b) Use one of the three Simpson's rule calculator programs to check your answer. Attach a screen shot. https://www.emathhelp.net/calculators/calculus-2/simpsons-rule-calculator/ (c) Do your answers match? (yes or no) 10. (10 points) x=30 Axi x=0 a. How much work is done lifting a 12 lb chair from the ground to the top of a building that is 30 feet high using a rope weighing 3 lbs/ft? (similar to #37-42) b. How much work is done lifting the same chair from the ground to a point 5 feet above the ground (instead of the 30 feet as in part a)?