Meng contributes to the maintenance of her invalid brother, Bo, who lives with her. Bo receives a disability support pension. What is Meng's allowable rebate for the current tax year under the following scenarios?

i)Bo has no adjusted taxable income and Meng has adjusted taxable income of $80.000;

ii)Bo has adjusted taxable income of $1,500 and Meng has adjusted taxable income of $80,000:

iii)Bo has adjusted taxable income of $2,000 and Meng has adjusted taxable income of $143,000.