3
y = f(x) on [0,4]
0 0 400 400
4
0.9 0.9
0 0
0 0
1 1 0 1 55 0 65
1 1
0
0.9 0.9
0 0
0 0
1 1 0 1 0 0 0
0 0
0
0.9 0.9
0 0
0 0
1 1 0 1 0 0 0
0 0
0
0.9 0.9
0 0
0 0
1 1 0 1 0 0 0
0 0
0
0.9 0.9
0 0
0 0
1 1 0 1 0 0 0
0 0
0
0.9 0.9
0 0
0 0
1 1 0 1 0 0 0
0 0
0
0.9 0.9
0 0
0 0
1 1 0 1 0 0 0
0 0
0
0.9 0.9
0 0
0 0
1 1 0 1 0 0 0
0 0
0
0.9 0.9
0 0
0 0
1 1 0 1 0 0 0
0 0