b) Forecast January sales using each of the following: i) Naive method. ii) A 3-month moving average. iii) A 6-month weighted average using .1, .1, .1, .2, .2, and .3, with the heaviest weights applied to the most recent months. iv) Exponential smoothing using an a = .3 and a September forecast of 18. v) A trend projection. c) With the data given, which method would allow you to fore- cast next March's sales? MONTH January February March April May June July August September October November December SALES 20 21 15 54 14 13 16 17 18 20 20 21 23