Required information (The following information applies to the questions displayed below.] In 2021, Elaine paid $2,080 of tuition and $880 for books for her dependent son to attend State University this past fall as a freshman. Elaine files a joint return with her husband. What is the maximum American opportunity tax credit that Elaine can claim for the tuition payment and books in each of the following alternative situations? (Leave no answer blank. Enter zero if applicable.) a. Elaine's AGI is $104,750. American opportunity tax credit b. Elaine's AGI is $167,500. (Round your intermediate calculations to the nearest whole dollar amount.) American opportunity tax credit c. Elaine's AGI is $208,500. American opportunity tax credit