Question: Please do in excel and post a screenshot along with any formulas/functions, if used: South Shore Construction builds permanent docks and seawalls along the southern

Please do in excel and post a screenshot along with any formulas/functions, if used:

South Shore Construction builds permanent docks and seawalls along the southern shore of Long Island, New York. The following data show quarterly sales revenues (in $'000s) for the past 5 years. Quarter 1 2 3 4 Year 1 20 100 175 13 Year 2 37 136 245 26 Year 3 75 155 326 48 Year 4 92 202 384 82 Year 5 176 282 445 181 Question 5 (25 pts) Suppose that the manufacturer wants to include adjustments for trend and seasonality. a. Quantify the seasonality in the time series by calculating seasonality indexes. (10 pts) b. Which of the four quarters shows the largest seasonal effect and how much? (2 pts) c. Using the trend and the seasonality information from (a) and (b) make forecasts from Q1 Year 1 through Q4 Year 5. (8 pts) d. Calculate the Mean Absolute Percent Error for this set of forecasts. (5 pts)

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