Problem 8-70 (LO 8-4) [The following information applies to the questions displayed below.] Trey has two dependents, his daughters, ages 14 and 17, at year-end. Trey files a joint return with his wife. What amount of child credit will Trey be able to claim for his daughters under each of the following alternative situations? Use Exhibit 8-8.

a. His AGI is $105,400.

b. His AGI is $424,000.

c. His AGI is $430,800, and his daughters are ages 10 and 12.

( could you please help me to answer these questions. Please try to give me explanation too.)