Use the following article on regression assumptions and answer the following questions https://scholarworks.umass.edu/pare/vol8/iss1/2/ A. How do we verify the assumption of normality (specify which graph)? What can we do if we don't meet the assumption of normality? B. How do we verify the assumption of constant variance (specify which graph)? What can we do if we don't meet the assumption of constant variance? C. How do we verify that x and y have a linear relationship (specify which graph)? What can we do if we don't meet the assumption of a linear relationship between x and y?