Anybody know? Need help

How can we find the measure of an exterior angle if we know the measurement of an interior angle

Pls never taught i’m really confused and i rlly need

What will be the end result for the taxpayer who filed his federal income tax return using the 1040ez form shown belowa he'll owe $173b he'll receive a refund of $173c he'll owe $3921d he'll receive a refund of $3921