Please show work and include the formulas so I can learn. TY

Company Pretax Income -2,548,000,000.00

Part 1. Use the Tax Foundation tax brackets for a single individual, calculate what your corporation would pay under a sole-proprietorship structure (i.e., its tax bill) and its average tax rate.

Part 2. The current corporate tax rate is a flat 21% and the Biden Administration is proposing a flat 28% rate (i.e., it does not have tiers or brackets). Calculate what the corporation should pay under the current corporate tax rate as well as under the proposed Biden Administration plan (i.e., its tax bill under each plan). Identify the company's tax provision for the same fiscal year. This can be found on the Income Statement under the pretax income line. Calculate the firm's actual tax rate paid in the fiscal year, calculated as Tax Provision divided by PreTax Income. Are the rates different? Note: If the tax provision for your firm is negative, that indicates the company received a tax refund (i.e., it did not pay taxes)