1. The diagram below shows the graph of $y=f(x)$, where $f(x)$ is the function defined by

$f(x)=\frac{sin3x}{{e}^{2x-3}},0\leqx\leq\frac{2 \pi }{3}$

The points A and B are maximum and minimum points, respectively.

Find the range of $f(x)$ , giving your answer correct to 3 decimal places.