Yes, skins cancer rates are greater in the southern latitudes, so clearly proximity to Antarctica and the ozone hole are linked.

Yes, ozone has been depleted since the mid 1980s, which clear coincides with an increase in skin cancer rates in Australia

No - the ozone hole is mostly contained over Antarctica, and does not result in higher ozone concentrations over Australia

No.  The Ozone hole was repaired when the Montreal treaty was signed in 1991, the most successful treaty ever signed by the World's governments