Robin, who is a head of household and age 42, provides you with the following information from his financial records for 2020. Robin itemizes deductions. Regular income tax liability Positive AMT adjustments AMT preferences Taxable income $143,145 30,000 100,000 481,000 Calculate Robin's AMT for 2020. O a $7,267. O b. $10,047 O c. $12,636. O d. $15,126.