The monthly sales for Telco Batteries, Inc., were as follows: Month Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec Sales 20 20 16 14 11 15 17 19 19 20 23 24 This exercise contains only parts b and c b) The forecast for the next month (Jan) using the naive method = sales. (Round your response to a whole number) The forecast for the next period (Jan) using a 3 -month moving average approach = 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 =