Can someone please show me how to solve these tax-problems. Thank you. (the answers selected are incorrect) correct answers are 5,616 for question 3 and 1200 for question 4

For the year 2017, Mary Larson, who is divorced, reported interest income of $100 and wages of $15,000. She maintains a household for herself and her two five-year-old twins who qualify as her dependents. What is the maximum earned income credit available to her for 2017? $6,000 O $5,616 O $0 $3,400 Question 4 6 pts Mr. and Mrs. Cruz file a joint return and claim exemptions for two children, ages 2 and 4. Mr. Cruz had wages of $24,500 during the year, while Mrs. Cruz was a full-time student from January through August. The Cruzes paid Playtime Nursery $600 per month for the entire year for the care of the children. The Cruzes' maximum allowable credit for child care is: $600 5792 $1,800 O $1.200