2021 (source code)

= 2021
{scope}
{title2=A15090W1}

Source paper: https://www.whatdotheyknow.com/request/oxford_physics_past_papers_2/response/2340696/attach/9/Physics%20Papers%202020.pdf?cookie_passthrough=1

Standalone paper: https://mmathphys.web.ox.ac.uk/sites/default/files/mmathphys/documents/media/gr_2021.pdf

The cover identifies Hilary Term 2021 but its date line says January 2020. The year here follows the term and the archived paper identity. Solutions cover all four questions.