We will first divide the interval [0,2] into 4 equal length subintervals each of length -------> (2-0)/4=1/2.
The four subintervals are
[0,1/2], [1/2,1], [1,3/2], [3/2,2] and the endpoints of these subintervals are
0, 1/2, 1, 3/2, 2.
