(a) Solve the equation

\(3\operatorname{cosec}^{2}\left(2\phi-\frac{\pi}{3}\right)=4,\)

for \(0\lt \phi\lt \pi\). Give your solutions in terms of \(\pi\).

(b) Given that \(2x-1=\operatorname{cosec}^{2}\theta\) and \(y+1=\tan^{2}\theta\), find \(y\) in terms of \(x\).