Please show how to do the Spectral Clustering algorithm using the below data of 4 clusters (NOTE: I am not looking for code; I need the calculations by hand):

Cluster 1			Cluster 2			Cluster 3			Cluster 4
x	y		x	y		x	y		x	y
1	1		0	7		7	8		5	3
0	3		1	6		9	9		6	2
			1	8					6	4
			2	5					7	2
			2	7					7	3
			2	8					7	5
									8	3
									8	4