Number 5?!? I don’t understand this someone please help me???!!

The dot diagram represents the motion of the motorcycle as it moves from left to right

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?