Kevin has an invalid brother JO who lives with him . JO receives a disability support pension. What is Kevin's allowable rebate for the current tax year under the following scenario?

1. JO has no adjusted taxable income and Kevin has adjusted taxable income of $80000
2. JO has adjusted taxable income of $1500 and Kevin has adjusted taxable income of $80000
3. Jo has adjusted taxable income of $ 2000 and Kevin has adjusted taxable income of $ 160000.