1. increasing your 401k deduction will your gross pay and federal taxes in the current year

The answer would be Decrease, Decrease.

Explanation:

Increasing your 401 k deduction, will Decrease your gross pay and Decrease your Federal Taxes in the current year.

Gross pay of a person is his pay without deductions of any taxes. When taxes are deducted from the salary, the remaining amount is called the Net Salary. So when 401 k are deducted from the salary, the gross pay will decrease, and in turns, the federal taxes will also decrease, because a percentage of taxes is deducted from the gross salary. So when gross salary decreases, the taxes decreases and vice versa.

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