Suppose the welfare benefit formula is
Benefit= $4.800-0.67 (Wages>$6,000)
(a) what is the marginal tax on
(i) The first $6,000 of wages?
(ii) Wages above $6,000?
(b) How large is the benefit if wages equal
(i) $0?
(ii) $4,000?
(iii) $9,000?
(c) What is the breakeven level of income in this case?