In how many ways can the letters of the word PENCIL be arranged so that (i) `N` is always next to `E` ? (ii) `Na n dE` are always together?

Explanation

To solve the question about arranging the letters of the word "PENCIL" with specific conditions, we will break it down into two parts.

### Part (i): N is always next to E

1. **Consider N and E as a single unit**: Since N must always be next to E, we can treat the combination NE as one letter. Therefore, we now have the following letters to arrange:
- NE (considered as one letter)
- P
- C
...