Answer Happy

Please read the whole question before answering. And also draw a
coordinate system.
Problem 3: A 10-kg block is attached to a very light horizontal spring on a smooth horizontal table. A force of 40 N is required to compress the spring 20 cm. Suddenly, the block is struck by a 4-kg stone traveling to the right at a speed v. = 3.90 m/s. The stone rebounds at 2.0 m/s horizontally to the left, while the block starts to oscillate. Find the Amplitude of the oscillation. (10 points)