Given 15 data points x = (x₁, x₂) and their class labels (y) as follows:

Instance #	x1	x2	y (label)
1	8	7	1
2	1	0	-1
3	7	5	1
4	3	-2	1
5	3	1	1
6	-6	5	1
7	1	8	1
8	-9	-6	-1
9	1	-9	-1
10	9	2	-1
11	3	-1	1
12	3	3	-1
13	-6	7	-1
14	2	2	-1
15	9	-3	-1

Suppose by solving the dual form of SVM, we obtained the s for each data point as follows:

2 =3.5, 5 =0.75, 11 =0.75, Others=0

1. Point out the support vectors in the training data.

2. Calculate the w for the decision hyper-plane.

3. Calculate the bias term b for the decision hyper-plane.

4. Classify a new data point x = (1, 2).