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An object undergoes uniformly accelerated motion from point x1 = 9 m at time t1 = 1 s to point x2 = 48 m at time t2 = 7 s.

(a) If the magnitude of the instantaneous velocity at t1 is v1 = 3 m/s, what is the instantaneous velocity v2 at time t2?

(b) Determine the magnitude of the instantaneous acceleration of the object at time t2.

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