Lovely Lawns, Inc., intends to use sales of lawn fertilizer to predict lawn mower sales. The store manager estimates a probable sixweek lag between fertilizer sales and mower sales. The pertinent data are: a. Determine the correlation between the two variables. (Round your answer to four decimal points.) b. Obtain a linear regression line for the data. (Round your answers to four decimal points.) c. Predict expected lawn mower sales for the first week in August, given fertilizer sales six weeks earlier of 1.9 tons. (Round your answer to two decimal points.)