[问答题]
The position of a racing car, which starts from rest atf:fpf;go1a ( w t = 0 e;20 kufty.ro6v6fvr8l g l on04ml5h and moves in a straight line, is given as a function of time in the following Table. Estimate (a) its velocity and (b) its acceleh0vm;n5t6f6l 2k4.loge rf8vlr0 yo uration as a function of time. Display each in a Table and on a graph.
