Yanni, who is single, provides you with the following information for 2021: Salary $128,200 State income taxes 12,820 Mortgage interest expense on principal 11,538 residence Charitable contributions. 2,564 Interest income 1,923 Click here to access the exemption table. If required, round your answers to the nearest dollar. Compute the following: a. Yanni's taxable income: Incorrect X b. Yanni's AMT base: c. Yanni's tentative minimum tax