Acar manufacturer would like to develop a regression model that would predict the number of cars sold per month by a dealership employee based on the employee's number of years of sales experience (exp), the employee's weekly base salary before commissions (salary), and the education level of the employee. there are three levels of education in the sales forcelong dashhigh school degree, associate's degree, and bachelor's degree. the following dummy variables have been defined: ed1equals1 for a bachelor's degree, ed1equals0 otherwise; ed2equals1 for an associate's degree, ed2equals0 otherwise. the given excel output shows the partially completed regression output from a random sample of employees from the previous month. what is the multiple coefficient of determination for this model?