The materials handling manager of a manufacturing company is trying to forecast the cost of maintenance for the company's fleet of over-the-road tractors. The manager believes that the cost of maintaining the tractors increases with their age. The following data was collected: a. Use POM for Windows' least squares-linear regression module to develop a relationship to forecast the yearly maintenance cost based on the age of a tractor. (Enter your responses rounded to three decimal places and include a minus sign if necessary.) Y=+X where Y=Y early maintenance cost in dollars and X= Age in years. b. If a section has 20 two-year-old tractors, what is the forecast for the annual maintenance cost? \$ (Enter your response rounded to two decimal places.)