A.2m/s2 B.0.5m/s2 C.0.2m/s2 D.0.3m/s2
A.0.5~0.35 B.0.35~0.3 C.0.3~0.2 D.0.4~0.5
A.0.25 B.0.20 C.0.15 D.0.34