Sketching a sine curve and the related cosecant curve, then solving a modulus equation

The function \(\mathrm{f}\) is given by \(\mathrm{f}(x)=2\,\mathrm{cosec}\,3x\).

1. On the grid below, sketch the graph of \(y=\sin3x\) for \(0\le x\le\pi\).[2]
2. On the same axes, sketch the graph of \(y=\mathrm{f}(x)\) for \(0<x<\pi\), showing every vertical asymptote.[3]
3. Solve the equation \(\left|\mathrm{f}(x)\right|=4\) for \(0<x<\pi\).[2]