Acar slows down from -27.7m/s to -10.9m/s while undergoing a displacement of -105m what was its acceleration

Can someone me out here number 4 plz

Askate shop rents roller skates as shown on the table below. which graph and function models this situation?

There are 3232 forwards and 8080 guards in leo's basketball league. leo must include all players on a team and wants each team to have the same number of forwards and the same number of guards. if leo creates the greatest number of teams possible, how many guards will be on each team?