Graph of the modulus of a secant drawn from its cosine, with asymptotes and an equation

The function \(\mathrm{f}\) is given by \(\mathrm{f}(x)=\left|\sec\left(\frac{\pi x}{2}\right)\right|\) for \(0\le x\le6\).

1. Sketch the graph of \(y=\cos\left(\frac{\pi x}{2}\right)\) for \(0\le x\le6\).[3]
2. On the same diagram, sketch the graph of \(y=\mathrm{f}(x)\), stating the equations of all the vertical asymptotes.[3]
3. Solve the equation \(\mathrm{f}(x)=2\) for \(0\le x\le6\).[2]