\fPressure Smoker Risk Age 135 Yes 15 209 Yes 48 199 No 15 119 Yes 66 166 No 80 125 Yes 62 117 No 207 Yes a. Develop an estimated regression equation that relates risk of a stroke to the person's age, blood pressure, and whether the person is a smoker. b. Is smoking a significant factor in the risk of a stroke? Explain. Use a = .05. c. What is the probability of a stroke over the next 10 years for Art Speen, a 68-year-old for this patient? smoker who has blood pressure of 175? What action might the physician recommend