Doug and Dana file a joint return. Doug eamed $35,000 during the year before losing his job. Dana received Social Security benefts of $5,200. Requirements a. Determine the taxable portion of the Social Secunity benefits. b. What is the taxable portion of the Soclal Security benefits if Doug earned $48,000 ? Requirement a. Determine the taxable portion of the Social Security benefits. Begin by computing the provisional income. Only select iterns that are applicable to Dan and Diana. (Leave unused input felds Blank, do not select a label or enter a zaro.) Provisional income The taxable portion of the Social Security benefits is Requirement b. What is the taxable portion of the Social Security beneftes if Doug earned $48,000 ? Begin by computing the provisional income. The provisionat income is The taxable portion of the Social Security benefits is