(solution) In a relay race, runner A (already in motion) must hand a baton

(solution) In a relay race, runner A (already in motion) must hand a baton

In a relay race, runner A (already in motion) must hand a baton to runner B (who is waiting as runner A completes the first part of the race). Runner A is moving at a constant speed v1= 8.47m/s. Runner B begins from rest, and has a constant acceleration of a2= 2.97 m/s^2. How far away should Runner A be at the moment Runner B begins to move so that they will both be at the same place at the same time and with the same speed?