The table below presents tax systems in the countries of Volcania, Singsville, and Minitown. The numbers indicate the percentage of income in that bracket that is taxed. Tax bracket Volcania Singsville Minitown $15.000 and under 20 24 24 $15.001 to $30,000 17 27 24 $30.001 to $45,000 14 31.5 24 $45,001 to $60,000 9.5 33 24 Which series most likely represents a proportional tax system? Volcania OSingsville OMinitown