could you answer question #2-3 please

1 ($6000 x 20%.) = 1200 for the year. Problem #2 DJ and Nicolette paid $1,600 in qualifying expenses for their daughter Nicole to attend the University of Nevada. Nicole is a sophomore. DJ and Nicolette's AGI is $175,000. What is their maximum allowable American opportunity tax credit after the credit phase-out based on AGI is taken into account? Problem #3 Jake is a single taxpayer. He has twin sons, ages 7. If his AGI is $216,950, what amount of child tax credit can he claim? Problem #4