National Scan, Inc, sells radio frequency inventory tags. Monthly sales for a seven-month period were as follows: Click here for the Excel Data Flle a. Forecast September sales volume using each of the following: (1) The naive approach. (2) A flve-month moving average. (Round your answer to 2 decimal places.) (3) A weighted average using 0.60 for August, 0.10 for July, and 0.30 for June (Round your answer to 2 decimal places.) (4) Exponential smoothing with a smoothing constant equal to 0,10 , assuming a March forecast of 15(000). (Round your intermediate forecast values and final answer to 2 decimal places.) (5) A linear trend equation. (Round your intermediate calculations and final answer to 2 decimal places.)