Evaluate the financial performance of Pfizer Inc. using the following income statements for the years ended December 31, 2022, and 2021.

Pfizer Inc.	2022	2021
Sales	$100,330	$81,288
Cost of Goods Sold	$33,450	$27,150
Gross Profit	$66,880	$54,138
Operating Expenses	$22,528	$20,572
Net Income	$31,394	$22,473

Requirements:

1. Calculate the gross profit margin for each year.
2. Calculate the operating profit margin for each year.
3. Compute the net profit margin for each year.
4. Analyze the growth in Pfizer Inc.'s profitability from 2021 to 2022.