In $2025,$ David is age $78,$ is a widower, and is being claimed as a dependent by his son. How does this situation affect the following: $($a$)$ filing requirements, $($b$)$ the basic standard deduction, and $($c$)$ any additional standard deduction amounts.

Complete the paragraph below:

David's filing requirements depend on whether the dependent income is

greaterlessgreater

than $$1,350$

andoror

the sum of the individual's earned income for the year

lessplusless

$$450.$ The total basic standard deduction cannot exceed

$$1,350$$$1,3650+$ $$450$$$1,600$$$1,600+$ $$2,000$$$15,000$$$1,3650+$ $$450$

$.$ Lastly, as David is $78-$year old widower, his additional standard deduction is

$$1,600$$$2,000$$$3,600$$$1,600$

$.$