Determine the amount of the standard deduction for each of the following taxpayers for tax year 2020 . a. Leo and Mary who are under age 65 and filing a joint return. They have no dependents. b. Sergio who is single under age 65 c. Peter who is over age 65 and single d. Anna who is age 38 and filing as head of household with a dependent child e. Frank who is age 45 and blind and is filing as married filing separately. For the toolbar, press ALT+F10(PC) or ALT+FN+F10(Mac)