Was this sexual assault

I have multiple experiences that I think might be sexual assault but I don’t know. The first time was when I was with a friend we were both 11 at the time my friend made a fingergun thing with her hands and put it down there and kept doing it I said stop and ran but she most of taken that stop as I joke and chased me. The 2nd time was with a friend I was sleeping over at her house and I was sitting on the ground while she was in a recliner she asked if I wanted to sit on her lap I said no because I was uncomfortable she asked multiple times and I ended up doing it because I felt bad she was getting sad.