A particle undergoing simple harmonic oscillation of period 7 (like that in Fig. 15-2) is
at -x at time t = 0. Is it at -x, at +x, at 0, between -x,,, and 0, or between 0 and
+x, when (a) t = 2.00T, (b) t = 3.50T, and (c) t = 5.25T?
see the problem in picture and solve it.