an accounting firm that specializes in auditing mining companies collected the data found in the file miningaudit.xlsx that accompanies this book describing the long-term assets and long-term debt of its 12 clients. a. prepare a scatter plot of the data. does there appear to be a linear relationship between these variables? b. develop a simple linear regression model that can be used to predict long-term debt from long-term assets. what is the estimated regression equation? c. interpret the value of r2. d. suppose that the accounting firm has a client with total assets of $50,000,000. construct an approximate 95% confidence interval for the amount of long-term debt the firm expects this client to have.