This is a position-time graph. The slope of the curve is the velocity.

The velocity is maximum when the curve crosses the time axis and zero at the turning points.

1. At what time or times is the particle moving to the right at maximum speed?

Enter your answers numerically separated by commas.

2. At what time or times is the particle moving to the left at maximum speed?

Enter your answers numerically separated by commas.

3. At what time or times is the particle instantaneously at rest?

Enter your answers numerically in increasing order separated by commas.

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