A person's systolic blood pressure, which is measured in millimeters of mercury (mm Hg), depends on a person's age, in years. The equation: P = 0.004y - 0.03y + 120 gives a person's blood pressure, P, at age y years. A.) Find the systolic pressure, to the nearest tenth of a millimeter, for a person of age 48 years. B.) If a person's systolic pressure is 126.11 mm Hg, what is their age (rounded to the nearest whole year)