In $2023,$ Laureen is currently single. She paid $$2,540$ of qualified tuition and related expenses for each of her twin daughters Sheri and Meri to attend State University as freshmen $($$$2,540$ each, for a total of $$5,080).$ Sheri and Meri qualify as Laureen's dependents. Laureen also paid $$1,820$ for her son Ryan's $($also Laureen's dependent$)$ tuition and related expenses to attend his junior year at State University. Finally, Laureen paid $$1,320$ for herself to attend seminars at a community college to help her improve her job skills.

What is the maximum amount of education credits Laureen can claim for these expenditures in each of the following alternative scenarios?

Note: Leave no answer blank. Enter zero if applicable.

a$.$ Laureen's AGI is $$45,000.$