1.1. The graph below shows a curve with equation $y=sin3x$ in the interval $-60^{\circ}\leqx\leq150^{\circ}$

Points A and B are the stationary points closest to the origin. State the coordinates of A and B.

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1.2. A straight line with equation $y=\frac{\sqrt{3}}{2}$ meets the graph $y=sin3x$ at three points, R, S, and T. Determine the coordinates of R, S, and T.