which of the following are correct? $($check all that apply$)-$ taxpayers must multiply their taxable income by the appropriate tax rates to calculate their tax liability before applying any tax credits $-$ all tax credits can reduce the tax liability below zero $-$ taxpayers receive the benefit of a minimum, fixed amount of deduction to simplify the computation of the tax liability. $-$ all taxpayers subtract the larger of the standard deduction or their itemized deductions $-$ a taxpayers effective tax rate $($ETR$)$ is equal to their tax liability divided by their taxable incom