3-) (20 Points) Mustafa earns 72,000 TRY in a year. Assume that he has 8,000 TRY tax exemption. The following figure shows the marginal tax rates for different income intervals. Marginal Tax Rate 40 35 25 15 15,000 35,000 65,000 Taxable Income a) Calculate total tax payments of Mustafa. b) Calculate average tax rate for Mustafa. Windows'u Etkinle Windows'u etkinletirme