The monthly sales for sandwiches at a bakery are provided in the table below (show all your work for full credit) (1 point each): Sales Nave Moving Weighted Exponential Method Average Average smoothening January February March April May June 17 222222222222 20 21 15 14 13 16 July August 18 September 20 October 20 18.6 November 21 19 December 23 19.6 January ? ? ? ? Forecast January sales using each of the following: a. Nave method b. 4-month moving average C. A 6-month weighted average using 0.1, 0.1, 0.1, 0.2, 0.2, and 0.3 with the heaviest weights applied to the most recent months. d. Exponential smoothening using an = 0.3. Forecasted data for October-December are provided in the table. e. With only the data and the methods given in the table, which method allows you to accurately forecast next March's sales?