5. Express as partial fractions. (6 marks) (a and b only) x + 2 x2 + 4 x' - 2x + 3 (a) (b (x - 1)(x (x + D)(x - 3) (x + 2)2 (x - 1) 6. Sketch the graph of the function given below locating asymptotes (4 marks) x2 - 8x + 15 7. Plot the curve whose parametric equations are x = t(t + 4), y = t + 1. Show that it is a parabola