using Uber technologies recent $10-$K$,$ complete the following

a$.$prepare a common size balance sheet for the years presented

b$.$Describe the types of assets the company owns. Which assets are the most significant to the company? Using the notes to the financial statements, discuss the accounting methods used to value assets. What other information can be learned about the asset accounts from the notes? Have there been significant changes to the asset structure from last year to the most recent year?

c$.$Does the company include amounts for the allowance for doubtful accounts on the balance sheet, in the MD&A$,$ the notes to the financial statements, or additional exhibits? If so$,$ analyze the accounts receivable and allowance for doubtful accounts.

d$.$Describe the types of liabilities the company has incurred. Which liabilities are the most significant to the company? Have there been significant changes to the liability and equity structure from last year to the most recent year?

e$.$Describe the leases, commitments, and contingencies of the company