#$2.$ Using the Fastgro Fertilizer Company data again, develop a seasonally adjusted forecast for the demand.

Use the upper table to compute the seasonal factors and the total forecast for year $2019.$

Use linear trend line: find the intercept and slope of the totals for years $2016-2018.$

Predict the total for $2019$ using the linear trend line equation.

Compute the seasonal factors for each quarter.