National Scan, Inc., sells radio frequency inventory tags. Monthly sales for a seven-month period were as follows: Month Feb. Mar. Apr. May. Jun. Jul. Aug. Sales (000) Units 20 23 7 25 18 28 30 a. Forecast September sales volume using each of the following: (1) The naive approach. Naive approach thousands (2) A five-month moving average. (Round your answer to 2 decimal places.) Moving average thousands (3) A weighted average using 0.60 for August, 0.20 for July, and 0.20 for June. (Round your answer to 2 decimal places.) Weighted average thousands (4) Exponential smoothing with a smoothing constant equal to 0.20, assuming a March forecast of 18(000). (Round your intermediate forecast values and final answer to 2 decimal places.) Forecast thousands (5) A linear trend equation. (Round your intermediate calculations and final answer to 2 decimal places.) Yt thousands