Given the tax rates as shown, what is the average tax rate for a firm with taxable income of OMR 230,000? Taxable Income $0 - 50,000 50,001 - 75,000 75,001 - 100,000 100,001 - 335,000 Tax Rate 15% 25% 34% 39% Select one: O a. 31.17 percent O b. 34.07 percent O c. 33.92 percent O d. 39.00 percent O e. 31.02 percent