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14.62 .. A mass is vibrating at the end of a spring of force constant225 N>m. Figure E14.62 shows a graph of its position x asa function of time t. (a) At what times is the mass not moving?(b) How much energy did this system originally contain? (c) Howmuch energy did the system lose between t = 1.0 s and t = 4.0 s?Where did this energy go?