The monthly sales for Yazici​ Batteries, Inc., were as​ follows: Month Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec Sales 21 23 15 12 13 18 16 19 19 22 20 24 The forecast for the next month​ (Jan) using the naive method​ = nothing sales ​(round your response to a whole​ number). The forecast for the next period​ (Jan) using a​ 3-month moving average approach​ = nothing sales ​(round your response to two decimal​ places). The forecast for the next period​ (Jan) using a​ 6-month weighted average with weights of 0.10, 0.10, 0.10, 0.20, 0.20, and 0.30. , where the heaviest weights are applied to the most recent month​ = nothing sales ​(round your response to one decimal​ place). Using exponential smoothing with a ​= 0.35 and a September forecast of 21.00 ​, the forecast for the next period​ (Jan) = nothing sales ​(round your response to two decimal​ places).