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=0.005y-0.01y+119

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 42 years.

B.) If a person's systolic pressure is 128.68 mm Hg, what is their age (rounded to the nearest whole year)?