[问答题]
The position of a raci;v xhb( j,w,kaug21ze l7e;bc9 -cmsg9p *5yz znvkr3ng car, which starts from rest at t = 0 and moves in a straight line, is given as a function of time in th3p vz9y z5r*kne following Table. Estimate (a) its velocity and (b) its acceleration as a function of time. Display each in a Table and on a graph.
