Refer to Add Math 360 Text Page 499 Activity 20A[br]for detailed instructions.

1. At what time t does the particle change direction (turn back)?[br]2. When is the particle instantaneously at rest? (State the value of t when this occurs)[br]3. Is the velocity of the particle at time t = 0 , also zero? If not, what is the velocity?[br]4. When does the particle return to the fixed point O?