First person pointer view is the answer
I would say the 1st one is the only one correct. The 2nd one should be who, the 3rd one should more and likely be whom, and the last one should probably be who. I don't know if I'm 100% though. I hope I helped.
Rosarea was the lady that sat in the back of the bus in 1892 at 5:26pm and Luciano’s cousin was sitting in the front in 1999 at 7:28pm