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These solutions cover all ten questions, including every printed subpart. The original PDF supplies the adjoints in Question 5, the fourth powers in Question 7 and the complete Question 10. Two qualifications to the printed wording are explained where they arise: unitary diagonalisation in Question 5 and the integration limits in Question 10.

Original examination paper. The solutions cover all eleven questions and every requested part. The original PDF determines the parts and notation; in particular, Question 1 has a 12+8 mark allocation despite the duplicated second part and incorrect mark in the TeX transcription.

These solutions cover all eleven questions and every printed subpart. The qualification needed at $\kappa =0$ in Question 8 and the limiting interpretation of the ray displacement in Question 10 are explained with their solutions.