using Uber Technologies most recent $10-$K answer the following:

A$.$ Using the consolidated statements of operations, analyze the profitability of the company by preparing a common$-$size income statement for the past three years. In addition, calculate sales growth and operating expense growth for each two$-$year period presented, as well as effective tax rates for all three years.

B$.$Using the consolidated statements of stockholders$$ equity for the company, explain the key reasons for the changes in the common stock, accumulated other comprehensive income, and retained earnings accounts. Evaluate these changes.Revenue

Costs and expenses

Cost of revenue, exclusive of depreciation and amortization shown separately below

Operations and support

Sales and marketing

Research and development

General and administrative

Depreciation and amortization

Total costs and expenses

Income $($loss$)$ from operations

Interest expense

Other income $($expense$),$ net

Income $($loss$)$ before income taxes and income from equity method investments

Provision for $($benefit from$)$ income taxes

Income $($loss$)$ from equity method investments

Net income $($loss$)$ including non$-$controlling interests

Less: net income $($loss$)$ attributable to non$-$controlling interests, net of tax

Net income $($loss$)$ attributable to Uber Technologies, Inc.

Net income $($loss$)$ per share attributable to Uber Technologies, Inc. common stockholders:

Basic

Diluted

Weighted$-$average shares used to compute net income $($loss$)$ per share attributable to common stockholders:

Basic

Diluted