Problem 2 Download the data in creatinine. cav. Each row is a patient in a doctor's office. The variables are: . age: patient's age in years. . creatclear: patient's creatinine clearance rate in ml/minute, a measure of kidney health (a higher rate means better clearance, i.e., more healthy). Use this data, together with your knowledge of linear regression, to answer three questions: A) What creatinine clearance rate should we expect for a 55-year-old? Explain briefly (using one or two sentences and equations) how you determined this. B) How does creatinine clearance rate change with age? (This should be a single number whose units are ml/minute per year.) Explain briefly (one or two sentences) how you determined this. C) Whose creatinine clearance rate is healthier (higher) for their age: a 40-year-old with a rate of 135, or a 60-year-old with a rate of 112? Explain briefly (a few sentences + equations) how you determined this