i	x1	x2	x3	x4	y
1	11	1	0	16.90	18.10
2	14	1	0	10.87	10.57
3	18	0	0	10.70	10.20
4	12	0	1	12.87	9.15
5	16	1	1	14.60	13.30
6	10	0	1	13.25	9.90
7	14	1	1	11.35	9.60
8	17	1	0	9.83	10.70
9	12	0	0	9.90	9.10
10	11	1	1	11.20	8.90
11	7	0	0	10.58	7.90
12	7	0	0	9.14	7.95
13	15	0	1	14.30	10.10
14	18	1	1	14.50	11.50
15	16	0	1	14.40	12.35
16	11	0	0	11.25	12.30