Problem 9-55 (LO 9-5) Determine the amount of the child tax credit in each of the following cases: Child Tax Credit Allowed a. A single parent with modified AGI of $215,300 and two child(ren). b. A single parent with modified AGI of $83,290 and one child(ren). c. A married couple, filing jointly, with modified AGI of $409,016 and four children)