can you help me with this please

3. A company wishes to evaluate the effect of four package designs of cereal boxes on sales. As the location impacts the sales as well, the company decided to try ve different stores. Each of those four packages where sold in each of those 5 stores and sells gures were recorded. The data is given below. Store Design1 Design2 Design3 Design4 (a) Write down the model, factor and levels for the problem. (b) Write down the ANOVA table and test if there is sufcient evidence to indicate that average sales differ by package design at 5% level