3

0

3

1

4

0

=z

k=3

l=2

1

2

1

-1

4

=

2

1

2

2

10

=

0

1

-3

-2

-20

=z

k=1

1

2

9

=

2

1

5

=

l=1

0

=z

1

=

2

=