A 2.3 kg mass starts from rest at point A and moves along the x-axis subject to the potential energy shown in the figure

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A 2.3 kg mass starts from rest at point A and moves
along the x-axis subject to the potential energy
shown in the figure below.
Determine the speed (in m/s) of the mass at points B, C, D. (For
each answer, enter a number.)
point B_______ m/s
point C ________m/s
point D _______m/s
(b)
Determine the turning points for the mass. (Select all that
apply.)
point A
point B
point C
point D
point E