QUESTION 9 National Scan, Inc., sells radio frequency inventory tags. Monthly sales for a seven-month period were as follows: Month Sales February 19 March April May June July August Forecast Septermber sales volume using each of the following: (a) The naive approach. (enter numbers only, no units, no dollar sign) QUESTION 10 (b) A five-month moving average. (enter numbers only, no units, no dollar sign) QUESTION 11 (C) A weighted average using 0.6 for August, 0.3 for July, and 0.1 for June (enter numbers only, no units, no dollar sign) QUESTION 12