Can someone please help me please Find calculated displacement

Velocity - 70 m/s
Time - 4s
Initial position- 0m
Final Position- 50m
Calculated Displacement(m) - ?

i need to see how to do it please help me

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If state law mandates that elevators cannot accelerate more than 2.40 m/s2 or travel faster than 14.8 m/s , what is the minimum time in which an elevator can travel the 373 m from the ground floor to the observatory floor? ?