Original source: Cambridge FOI 2023/399 released PDF, physical pages 797–799.
Original solutions covering every option, including all three essay alternatives. [ref]
https://www.whatdotheyknow.com/request/natural_science_tripos_physics_e_2/response/2340776/attach/2/FOI%202023%20399%20Zahid%20materials.pdf?cookie_passthrough=1#page=724. Original public PDF, physical pages 724–727; dated 14 January 2015
There are unlisted articles, also show them or only show them.