How to remove a specific range of row regardless of blank/empty lines using regex?

[lightning speed]

Hi there,
How to remove a specific range of rows, for example, need to remove lines 2-5 regardless of blank/empty lines or lines containing info. Many thanks

Before

1. 1a@3536
2. 123abc@
3. abc!153
4. #@!af35
7. ff@#123
8. wt3ef@1
9. 3*^tu12

After

1. 1a@3536
3. ff@#123
4. wt3ef@1
5. 3*^tu12

[Paul Wormer]

@lightning-speed Find: (?-s)\A(.*\R){1}\K(.*\R){4} Replace: empty field

[lightning speed]

@Paul-Wormer
It’s works perfectly. Many Thanks