8.) The region bounded by the curve y = Ix, x = 0, y = 0 and x = 9is rotated about the xaxis. a.) Find the value of a in the interval [0 ,9] that divides the region into 2 parts of equal area. Write your answer as both an exact value and as a decimal approximation using your calculator. b.) Find the value of a in the interval [0 ,9] that divides the region into 2 parts of equal volume. Write your answer as both an exact value and as a decimal approximation using your calculator