Physics

A certain elevator cab has a total run of 215 m and a maximum speed is 309 m/min, and it accelerates from rest and then back to rest at1.11 m/s2. (a) How far does the cab move while accelerating to full speed from rest? (b) How long does it take to make the nonstop 215m run, starting and ending at rest?(a) = 11.9 m(b) ???