Possible stray babies anyone know these cuties t

There are two the other is not in the picture they often spend time on the sidewalk and are so friendly they look very thin and often seem to be very dirty. The other cat is a paler tabby she is super skinny and was in desperate Need of help if seemed since she ran up and then tried to stop me from leaving by nipping my ankle . I am so worried about these babies. by the westside school .let me know if you recognize this one or her friend