The displacement -time graph of a particle executing `SHM` is shown in figure. Which of the following statements is/are true ?
A. The force is zero at `t=(3T)/(4)`
B. The acceleration is maximum at `t=(4T)/(4)`
C. The velocity is maximum at `t=(T)/(4)`
D. The PE is equal to KE of oscillation at `t=(T)/(2)`
