needs parts 3-5. will upvote! thank you

National Scan, Inc., sells radio frequency inventory tags. Monthly sales for a seven-month period were as follows: Click here for the Excel Data File a. Forecast September sales volume using each of the following: (1) The nalve approach. (2) A five-month moving average. (Round your answer to 2 decimal places.) Answer is complete and correct. (3) A weighted average using 0.55 for August, 0.20 for July, and 0.25 for June. (Round your answer to 2 decimal places.) Answer is complete but not entirely correct. Weighted avernge (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.) Answer is complete but not entirely correct. (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.) Answer is complete but not entirely correct. (5) A linear trend equation. (Round your intermediate calculations and final answer to 2 decimal places.) Answer is complete but not entirely correct