In a study of the forces involved when motor proteins move subcellular structures in cells, Shtridleman et al.* studied the motion of objects in living cells. In this paper, they extracted the position of a vesicle using video. Some of the frames are shown in the figure on the left below and a graph of the position of one of the vesicles that moved along a straight line (in a direction they call y) is shown on the right. Six instants of time are identified on the graph and labeled by the letters A through F. Assuming that a smoothed model of the motion is appropriate for understanding the forces involved, choose the letter for the instant of time that would represent the events labeled in parts 1 through 4 below.1. The instant of time at which the vesicle is moving with the highest speed. ---Select--- A B C D E F 2. The instant of time at which the vesicle is moving with the slowest speed. B 3. The instant of time at which the vesicle feels force of the largest magnitude. E 4. The instant of time at which the magnitude of the vesicle's acceleration is the largest. ---Select--- A B C D E F For the items 5 and 6 below choose the item that is the best match.5. The instantaneous speed at instant D. ---Select--- 2.0 µm/s 0.1 µm/s 1.0 µm/s 6. The average speed between t = 0 a