This part of the question concerns the quadratic function y = -x2 + x + 2. (1) Write the quadratic expression -x2 + x + 2 in completed-square form showing your working. [2] (ii) Use the completed - square form from part (C) (D) to solve the equation -x2 + x + 2 = 0. [3] (iii) Use the completed - square form from part (C)⑪1) to write down the coordinates of the vertex of the parabola y = -x2+x+2. [1] (iv) Provide a sketch of the graph of the parabola y = -x2+x+2, either by hand or by using a suitable graphing software package like Graphplotter. [3] If you intend to go on to study more mathematics, then you are advised to sketch by hand for the practice. Whichever method you choose, you should refer to the graph - sketching strategy box in Subsection 2.4 of Unit 10 for information on how to sketch and label a graph correctly.