[问答题]
The position of a racing car, which st8wzm -us)3kari7-qwyw9o n- h arts from rest at t = 0 and moves in a str-) -y-8wowh7rkizq9s u3maw n)w m 5. zga)iqx hz6uysh.4f/qaight line, is given as a )x.u4 .shyhamg/f q 6iz z5q)wfunction of time in the following Table. Estimate (a) its velocity and (b) its acceleration as a function of time. Display each in a Table and on a graph.
