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The motion of a toy car ($m = 2 \text{ kg}$) is illustrated in the force versus time graph shown. Assume the toy car starts at rest at $t = 0\text{ s}$ and frictional forces are negligible.

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Starting at $t = 8\text{ s}$, the toy car travels for an additional $2\text{ seconds}$ before coming to a stop. Which of the following values indicates the constant force applied to the toy car during these final $2\text{ seconds}$?


$4 \text{ N}$


$-6\text{ N}$


$6\text{ N}$


$-4 \text{ N}$

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