The equation Bold r (t )equalsBold cos (4 t )Bold i plus Bold sin (4 t )Bold j, t greater than or equals 0 describes the motion of a particle moving along the unit circle. Answer the following questions about the behavior of the particle. a. Does the particle have constant speed? If so, what is its constant speed?b. Is the particle's acceleration vector always orthogonal to its velocity vector?c. Does the particle move clockwise or counterclockwise around the circle?d. Does the particle begin at the point (1 comma 0 )?