Trey has two dependents, his daughters, ages $14$ and $18,$ at year$-$end. Trey files a joint return with his spouse.

What amount of child tax credit $($either as a child or a qualifying dependent$)$ will Trey be able to claim in $2022$ for his daughters under each of the following alternative situations? Use EX$8-8.$

Required:

a$.$ His AGI is $$100,000.$

b$.$ His AGI is $$420,000.$

c$.$ His AGI is $$420,100,$ and his daughters are ages $10$ and $12.$

EX$8-8$ Child Tax Credit Phase$-$Out Threshold