In 2021, Juanita is married and files a joint tax return with her husband. What is her tentative minimum tax in each of the following alternative circumstances? Use Tax Rate Schedule, Dividends and Capital Gains Tax Rates for reference. (Input all values as positive. Leave no answer blank. Enter zero if applicable.) a. Her AMT base is $148,000, all ordinary income. Description (1) AMT base (2) Dividends taxed at preferential rate (3) Tax on dividends (4) AMT base taxed at regular AMT rates (5) Tax on AMT base taxed at 26% rate (6) Tax on AMT base taxed at 28% rate Tentative minimum tax Amount