You are driving down a two-lane country road, and a truck in the opposite lane is traveling toward you. Suppose that the speed of light in a vacuum is c = 65 m/s. Determine the speed of the truck relative to you when
(a) Your speed is 25 m/s and the truck's speed is 35 m/s and
(b) Your speed is 5.0 m/s and the truck's speed is 55 m/s. The speeds given in parts (a) and (b) are relative to the ground.