A hiker travels south along a straight path for 1200 meters then they turn around and walk 800 meters north. If they have been walking for 1.5 hours...

what speed have they been walking at?

what velocity did they have for the entire motion?

I was provided the equations Final Velocity = VI + A* average T, average displacement = 1/2(VI + VF) T, and average displacement = VI (average T) + 1/2 A (average T)^2