I am having difficulty in setting up paragraph numbering the way I want.

What I am trying to achieve is as follows:

1) Line 1
2) Line2
a. Line 3
b. Line 4

Line 5

Where Line 5 is part of 2) (not b.) but is not numbered.

When I do this I get to the point:

1) Line 1
2) Line2
a. Line 3
b. Line 4

Line 5

But if I do the shift tab to bring Line 5 back to the higher level Line 4 also shifts so it winds up as follows:

1) Line 1
2) Line2
a. Line 3
3) Line 4

Line 5

Is there a way around this problem?