A medical researcher found a significant relationship among a person’s age x1, cholesterol level x2, sodium level of the blood x3, and systolic blood pressure y. The regression equation is y’ = 97.7 + 0.691x1 + 219x2 + 299x3. Predict the systolic blood pressure of a person who is 35 years old and has a cholesterol level of 194 milligrams per deciliter (mg/dl) and a sodium blood level of 142 milliequivalents per liter (mEq/l).