In this assignment you are required to use the relevant built-in function in Excel to estimate a simple linear regression model. As essential preparation for this assignment you should have worked through the computing exercise sets given in the computing exercise le in the 'Supplementary Materials\" module of the Week 2 Learning Materials. Suppose the managers of a retailing company are interested in the relationship between the following two variables: 0 The sales revenue in dollars (say Y) generated by a salesperson in his/ her rst year of completed service. 0 The score {sayX) in an aptitude test taken by each new salesperson at the start of her/\"his employment with the company. Using a random sample of data for 42; salespeople that recently completed their rst year of service with the company, you are required to estimate a conditional expectation function of the following form by least squares regression using the Microsoft Excel regression tool