$[$The following information applies to the questions displayed below.$]$

In $2023,$ Zach is single with no dependents. He is not claimed as a dependent on another's return. All of his income is from salary, and he does not have any for AGI deductions.

What is his earned income credit in $2023$ in the following alternative scenarios? Use Exhibit $8-10.$

Note: Round your intermediate and final answers to the nearest whole dollar amount. Leave no answer blank. Enter zero if applicable.

a$.$ Zach is $29$ years old, and his AGI is $$5,000.$