Question 3 - 15 marks You should be able to answer this question after studying Unit 7. (a) Find the partial fraction expansion of the rational expression 423 3322 + 562 + 46 10 z? 9z + 20 110] (b) Use the partfrac command in Maxima to verify your answer to part (a). Include a screenshot or printout of your Maxima worksheet in yOur answer. [1] () Hence (without using Maxima) find the integral 4z3 3322 + 562 + 46 /de (4] z? 9z + 20