3. Clarita is a single taxpayer that lives in the U.S. with two dependent children, ages 10 and 12. Clarita pays $3,800 in qualified child care expenses during the year. If her adjusted gross income (all from wages) for the year is $21,000 and she takes the standard deduction, calculate Clarita's child tax credit, earned income credit, and child and-dependent care credit for 2021.