3. Sophie is a single taxpayer. For the first payroll period in July 2020, she is paid wages of $2,200 monthly. Sophie claims one allowance on her pre-2020 Form W-4. a. Use the percentage method to calculate the amount of Sophie's withholding for a monthly pay period. $ b. Use the wage bracket method to determine the amount of Sophie's withholding for the same period. $ c. Use the percentage method assuming Sophie completed a 2020 Form W-4 and checked only the single box in Step 1(c). d. Use the wage bracket method using the same assumptions in part c of this question