Mark Butler is the Minister for Health and Aged Care. The Port Adelaide MP has held the ministries of housing, homelessness, social inclusion, climate change, water and the environment since entering the federal parliament in 2007.

Dr Monique Ryan is the independent MP for Kooyong in Melbourne. She was formerly director of the Neurology Department at the Royal Children’s Hospital, where she was head of a research program into nerve and muscle disorders in children.

Bronnie Taylor sat in the NSW parliament for close to a decade, serving as minister for regional and mental health, women and regional youth. She’s a registered nurse and has previously specialised in cancer and palliative care.

Johann Hari is a writer, journalist and the author of multiple internationally best-selling books, including investigations into attention, addiction, depression and weight loss. He’s also written for The New York Times, Le Monde and The Guardian.

Dr Preeya Alexander works as a GP in Melbourne and is involved in medical education supporting training GPs. She blogs and uses social media to combat misinformation and deconstruct complex medical topics for audiences.

Daniel Williams asked: I am a descendant of the Gureng Gureng people in Bundaberg and the Meriam Mer people of the Eastern Torres Strait. Throughout last year's Indigenous Voice referendum, the monarchy provided no comment toward the proposal, Indigenous self-determination, or the effects of colonialism linked to their lineage. What is your party's position on the repatriation of Indigenous remains and return of artefacts to country?

Decades of backroom deals between state governments and toll operators have left Australia's biggest cities with a network of private roads that are worsening the cost-of-living crisis. Pat McGrath investigates.