National Scan, Inc., sells radio frequency inventory tags. Monthly sales for a seven-month period were as follows: Month Sales (000)Units Feb. 17 Mar. 18 Apr. 11 May. 22 Jun. 19 Jul. 21 Aug. 22 b. Forecast September sales volume using each of the following: (1) A linear trend equation.(Round your intermediate calculations and final answer to 2 decimal places.) Yt 22.73 thousands (2) A five-month moving average. (Round your answer to 2 decimal places.) Moving average 17.4 thousands (3) Exponential smoothing with a smoothing constant equal to .30, assuming a March forecast of 18(000). (Round your intermediate forecast values and final answer to 2 decimal places) Forecast thousands (4) The naive approach. Naive approach thousands (5) A weighted average using .50 for August, .20 for July, and .30 for June. (Round your answer to 2 decimal places.) Weighted average thousands