Use yahoo finance to find information for the common stock of Pfizer Corporation. Pfizer Inc. develops, manufactures, and sells healthcare products worldwide. It offers medicines and vaccines in various therapeutic areas, including cardiovascular metabolic and pain under the Eliquis, Chantix/Champix, and Premarin family brands; biologics, small molecules, immunotherapies, and biosimilars under the Ibrance, Sutent, Xtandi, Xalkori, Inlyta, Braftovi + Mektovi brands; and sterile injectable and anti-infective medicines under the Sulperazon, Medrol, Vfend, and Zithromax brands.

Q1: What was PFE 's Price/Earnings Ratio on 12/31/2019?

Q2. What was the price of the stock 5 years ago?

Q3. If you bought PFE 5 years ago at this price, and sold it today, how much did you earn per year, compounded annually? [This is similar to the average annual return calculation that we did for the Fidelity mutual funds].

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