0 I Find the positive value of a for which I x3 .1.- d: = 0. 0 b For this value of a, nd the total area enclosed between the z-axis and the curve 3 = z' z for 0 S a: g a. Find the area enclosed between the graph of y = k3 2' and the z-axis, giving your answer in terms of k. e Letz) =21'3:'3:=+2. a i Show that (z 2) is a factor of f(:.-) and hence factorise r) completely. il Sketch the graph of y = x), labelling clearly the points where the curve crosses the coordinate axes. b Find the exact area enclosed by the :-axis and the graph of y = [(2)