<span>No.
From the data provided you can not determine what the standard deviation is. In order to determine the standard deviation you need the actual grades not just a mean.</span>
1) . 2) . 3) The particle is moving right when the velocity function is positive: or . 4) When the particle is slowing down because the acceleration is close to zero the particle is speeding up when acceleration is increasing away from zero: . 5) .