If a person retires and receives a superannuation lump sum after their preservation age (but before the age of 60), that person can take advantage of the 'low-rate cap'. For the 2019/20 Financial Year, if a person takes a lump sum withdrawal from their super fund that exceeds the 'low-rate cap', then tax is payable on the taxable component above the low rate cap at the rate of (________________) assuming contributions come from a taxed source.