A brass (non-magnet k) block A and a steel magnet B are in equilibrium in a brass tube under the magnetic repelling force of another steel magnet C located at a distance x = 0.004 m from B. The force is inversely proportional to the square of the distance between B and C. If block A is suddenly removed, the acceleration of block B is a = 9.81 + k/x2, where a and x are expressed in m/s2 and meters. Respectively, and k = 4 × 10-4m3/s2. Determine the maximum velocity and acceleration of B.

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