7.) For income x (in dollars), a particular state's income tax T (in dollars) is given by

0.025xif 0 < x < 3000

T(x) =

50 + 0.28(x - 3000)if 3000 < x < 8000

250 + 0.04(x - 8000)if x > 8000

(a) What is the tax on an income of $8,000?

(b) What is the tax on an income of $80,000?