please answer this homework question, thanks!

Question 21 3 pts Fill out the table using exponential forecasting with an alpha of 0.3. What is the Root Mean Square Error (RMSE) based on the exponential forecasting? Round the RMSE to the nearest whole number (Ex. 14) after reaching the end of the problem. Do not round the calculations while working the problem - for the forecasts keep all decimal points (longest will be to three decimal places, ex. 0.114). The naive forecast for June 9 should count in your calculations of the error (forecast error and counted as a day for finding the mean error). Day 6/8/2021 6/9/2021 6/10/2021 6/11/2021 Actual 68 74 72 70 Value Exponential 68 Forecasting