After their state changed the assessment rate for all local government property tax systems from 70% to 60% the property tax levy in armie town remained unchanged. What would explain what happened in armie town if the above statement is true? (select all correct answers)

1. property tax bills all increased
2. property tax bills all decreased
3. mil rates increased
4. mil rates remained the same and tax levies increased
5. assessment to sales ratios increased
6. market values increased