Yanni, who is single, provides you with the following information for 2021: Salary $92,200 State income taxes 9,220 Mortgage interest expense on principal residence 8,298 Charitable contributions 1,844 Interest income 1,383 Click here to access the exemption table. If required, round your answers to the nearest dollar. Compute the following: a. Yanni's taxable income: $fill in the blank 1 18,901 b. Yanni's AMT base: $fill in the blank 2 c. Yanni's tentative minimum tax: $fill in the blank 3