National Scan, Inc., sells radio frequency inventory tags. Monthly sales for a seven-month period were as follows: Month Sales (000)Units Feb. 19 Mar. 18 Apr. 10 May. 21 Jun. 16 Jul. 24 Aug. 27 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 ________ thousands (2) A five-month moving average. (Round your answer to 2 decimal places.) Moving average _______ thousands (3) Exponential smoothing with a smoothing constant equal to .50, assuming a March forecast of 17(000). (Round your intermediate calculations and final answer to 2 decimal places.) Forecast ________ thousands (4) The naive approach. Naive approach ________ thousands (5) A weighted average using .70 for August, .20 for July, and .10 for June. (Round your answer to 2 decimal places.) Weighted average_____________ thousands