5) Zero Question 7 (1.5 points) The effective tax rate for a period is calculated by dividing 1) total income tax expense by the pre-tax income on the income statement 2) taxable income by the pre-tax income on the income statement. 3) future income tax expense by pre-tax income on the income statement. 4) total income tax expense by taxable income. 5) taxable income by total income tax expense