A single person earns a gross biweekly salary of $780 and claims 6 exemptions. how does their net pay change due to the federal income tax withheld? a. no federal income taxes are withheld. b. they will add $11 to their gross pay. c. they will subtract $11 from their gross pay. d. they will add $13 to their gross pay. please select the best answer from the choices provided a b c d