The cubic equation \(3z^3 + pz^2 + 17z + q = 0\), where \(p\) and \(q\) are real, has a root \(\alpha = 1 + 2\mathrm{i}\).
- Write down the value of another non-real root, \(\beta\), of this equation. [1 mark]
- Hence find the value of \(\alpha\beta\). [1 mark]
- Find the value of the third root, \(\gamma\), of this equation. [3 marks]
- Find the values of \(p\) and \(q\). [3 marks]