(a) Let f(x) 2x²+x-4 x3x²-2x [20 marks] Find a partial fraction decomposition of f. (b) From (a), find the indefinite integral [f(z) dr. [10 marks] 127 (c) Find the volume of the solid obtained when the region R bounded by the curves y = √, x = 3, y = 0 and x = 0 is revolved about the y-axis.