Riverbend Inc. received a $200,000 dividend from stock it held in Hobble Corporation. Riverbend's taxable income is $2,100,000 before deducting the dividends received deduction (DRD), a $40,000 NOL carryover, and a $100,000 charitable contribution. UseExhibit 16-6.(Round your tax rates to 1 decimal place. Leave no answer blank. Enter zero if applicable.)

a. What is Riverbend's deductible DRD assuming it owns 10 percent of Hobble Corporation?

b. Assuming the facts in part (a), what is Riverbend's marginaltax rate on the dividend?

c. What is Riverbend's DRD assuming it owns 60 percent of Hobble Corporation?

d. Assuming the facts in part (c), what is Riverbend's marginal tax rate on the dividend?

e. What is Riverbend's DRD assuming it owns 85 percent of Hobble Corporation (and is part of the same affiliated group)?

f. Assuming the facts in part (e), what is Riverbend's marginal tax rate on the dividend?

I am having trouble in how to work this problem.