You may need to use the appropriate appendix table or technology to answer this question. The data on y = annual sales ($1,000s) for new customer accounts and x = number of years of experience for a sample of 10 salespersons provided the estimated regression equation = 80 + 4x. For these data, x = 7, (x; - x) = 142, and s = 4.6098. (a) Develop a 95% confidence interval for the mean annual sales (in thousands of dollars) for all salespersons with nine years of experience. (Round your answers to two decimal places.) $112.03 thousand to $ 119.97 thousand (b) The company is considering hiring Tom Smart, a salesperson with nine years of experience. Develop a 95% prediction interval of annual sales (in thousands of dollars) for Tom Smart. (Round your answers to two decimal places.) $104.66 thousand to $ 127.34 thousand