Hello, can someone help me with this question?

X Screen Shot 2022-12-2... . .. Ims.alasala.edu.sa The position of a particle which moves along a straight line is defined by the relation: X = t' - 6t 2 - 15t_+ 40 where x is expressed in meter and t in seconds. Determine the a. Time at which the velocity will be zero, b. Position and distance traveled by the particle at that time, c. Acceleration of the particle at that time, d. Distance traveled by the particle from t = 4 stot = 6 5