PLEASE be very detailed...THANK YOU!

Briefly discuss how MERCK INC. (MRK) stock has performed relative to S&P 500 over the last TWO years. If there are noticeable changes in the chart (such as a sudden drop in the share price), make sure to comment on the possible causes(s) and back it up with research. stock price data for MRK and the S&P 500 index for the past two years. You can obtain this data from finance websites or platforms like Yahoo Finance, Google Finance, or through financial APIs.

Please help with answering the question completely and not by guiding me through how to obtain the answer as I am using my phone.