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 15 13 16 15 17 22 20 2322 This exercise contains only parts b and c. b) The forecast for the next month (Jan) using the naive method = 22 sales round yourre sponse to a who number The forecast for the next period (Jan) using a 3-month moving average approach 21.67 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 = 20.6 sales (round your response to onθ decimal place) Using exponential smoothing with α = 0.30 and a September forecast of 21.00, the forecast for the next period (Jan) sales (round your response to two decimal places).