Problem 15-13 (Algorithmic) The values of Alabama building contracts (in millions of dollars) for a 12 -month period follow. a. Choose the correct time series plot. What type of pattern exists in the data? b. Compare a three-month moving average forecast with an exponential sineothing forecast. Use =0.2. Which provides the better forecasts based on H5E? Do not round your intermediate caiculations ond raund your final answers to two decimal places. c. What is the forecast for the next month? Round your answer to the neareat whole number. mellions of doliars