The corporate triple A bond interest rates for 12 consecutive months are given in the file. a. Construct a time series plot. What type of pattern exists in the data? b. Develop 3-month and 4-month averages for this data. Does the 3-month or 4-month moving average provide the better forecasts based on MSE? Explain. c. What is the moving average forecast for the next month?

Interest Rate 9.5 9.3 9.4 9.6 9.8 9.7 9.8 10.5 9.9 9.7 9.6 9.6