in https://4unitmaths.com/2024-e2-5-papers.zip are the 2024 papers from barker, fort st, killara, north sydney girls and sydney grammar and here are the proof questions
barker: Q11d, 14a, 14b
killara: Q1, 2, 8, 12a, 12b, 13a, 13b, 14a, 16b
north sydney girls: Q9, 11e, 13c, 14c, 16a, 16b...