[问答题]
The position of a racing car, w3l5rvs ;xk clt,n7q )which startmo7/l9 6pnykp*-3 eh z9/i4pa gvjenv s from rest at t = 0 and moves in a straight line, is 9pn k/ hlvz3ejn* o6ea4yp 7 -9givpm/given as a function 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.
