(21 points) SummerFun, Inc., produces a variety of recreation and leisure products. The production manager has developed an aggregate forecast: Develop an aggregate plan using each of the following guidelines and compute the total cost for each plan. (Templates are available on Excel file) a. (7 points) Level strategy: A constant output rate, with backlogs and inventory to handle variations in demand. (Make sure that you don't have backorders at the end of November.) b. (7 points) Chase strategy: Output is set at the expected demand for each period, with overtime and subcontracting. c. (7 points) Assume that we would like to use mathematical programing (Excel Solver) to find the minimum cost plan. Fill the cost table given in the excel file. Bonus (10 points) Use Excel solver and the cost table from part c to find the minimum cost plan