Kinematics

Two particles An and B are located at the origin of a co-ordinate system.Both the particles start moving at the time t=0 simultaneously.The particle A moves with a speed of 2pi m/s on a circle x²+y²+120y=0,inclockwise direction and the particle B moves with constant acceleration such that at t=5 s the vlocities of bith the particles become equal..Find
(a)the average acceleration of the particle during this time interval.
(b)their velocities at the time t=5s
(c)their position vectors at the time t=5 s.
(Distances are in metres.