Two automobiles A and B traveling in the same direction in adjacent lanes are stopped at a traffic signal. As the signal turns green, automobile A accelerates at a constant rate of 6.5 ft/s2. Two seconds later, automobile B starts and accelerates at a constant rate of 11.7 ft/s2. Determine
(a) When and where B will overtake A,
(b) The speed of each automobile at that time.