A "rocket car" is launched along a long straight track at t = 0 s. It moves with constant acceleration a₁ = 2.0 m/s². At t = 2.0 s, a second car is launched along a parallel track, from the same starting point, with constant acceleration a₂ = 8.0 m/s². 

a. At what time does the second car catch up with the first one? 

b. How far have the cars traveled when the second passes the first?