Hello, My name is Sara Smither and yesterday night I came across this website. I noticed that at least 2 of my papers that I have previously written...

Hello,My name is Sara Smither and yesterday night I came across this website. I noticed that at least 2 of my papers that I have previously written for college courses were posted on this site. I did not post these papers myself, nor did I give permission for them to be posted. Could you please tell me how I can find out who posted them and how to remove them?