4. A Supermark Chain coducted an experiment to determine where to place a generic band product in order to incease sales. Sales record for six-month period were tabulated by store and shelf position as follows: Stors in the Supermarket Chain Shelf Store 1 Store 2 Store 3 Sales in USS Sales in US$ Sales in US$ High Shelf 5722 5333 4900 Eve -level Shelf 5000 5500 5300 Low Shelf 3400 2500 1909 (a) Formulate two research questions for the scenario utilizing the dependent variable and the independent variables (b) Formulate two separate hypotheses to address theresearch questions in (a) (c) Use a manual calculation to generate the relevant sums squares for a two-way analysis of variance and produce the Table to test the hypotheses in (b) at 5% level of siginificance. (d) From your hypotheses testing, which of the factors affects the sales of the generic brand product