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Part $1$

The manager of a utility company in the Texas panhandle wants to develop quarterly forecasts of power loads for the next year. The power loads are$$ seasonal, and the data on the quarterly loads in megawatts$($MW$)$ for the last four years are as$$ follows:The manager estimates the total demand for the next year at $715MW.$ Use the multiplicative seasonal method to

develop the forecast for each quarter. $($Round all intermediate calculations to three decimal places.$)$

The first quarter forecast is MW$.($Enter your response rounded to one decimal place.$)$