For all the problems, to receive full score, you must show your complete and accurate work, i.e., show how you calculated the numbers you use. If you only provide the final answers without computations, you will not receive a full score even if the answer you provided is correct (and will miss the opportunity of partial credits if your answer is not correct). The computations should show all the steps you use. Note that, if you use Excel and Excel formulas/tools (e.g., average function or regression tool in Data Analysis) to come up with solutions, your solution steps will be included in the Excel file. The points from the bonus question in this homework will count towards your Homework 1 score. Problem 1. (10 points) A manager recorded the number of gallons of ice cream sold for the past six periods. He asked you to choose a forecasting model to predict the demand for gallons of ice cream in Period 7. You consider applying a two-period moving average model and a two-period weighted moving average model with weights of 0.55 and 0.45. a) Which model is better for this data set (hint: show all your work and calculations using measures of forecast accuracy)? ( 9 points) b) What is the forecast of demand for period 7 considering the best model? ( 1 point)