REMEMBER,DONT USE ARTIFICIAL INTELIGENCE, DONT USE CHATGPT A 10 cm elastic spring has one end fixed to a vertical wall and rests on a frictionless horizontal surface. A force of 20 N is applied to keep it stretched to a length of 15 cm. This position is released and it oscillates freely with an oscillation period of 4 seconds. Calculate:a. The spring's recovery constant.b. The energy of the system considering the concept of amplitude.

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