In 2018, Elaine paid $2,480 of tuition and $1,240 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 credit that Elaine can claim for the tuition payment and books in each of the following alternative situations? a. Elaines AGI is $87,000. b. Elaines AGI is $179,000 c. Elaines AGI is $233,500.