Answers:

1. Maria aim the letter to Aelia, where she is currently on holiday and misses Aelia, so with that, she wrote a letter for Aelia talking about how she misses her as well as can't wait to see her again whilst bringing some gifts from her vacation trip (which should be Abu Dhabi).

2. The salutation from the letter above would be "Dear Aelia" as it is a form of greetings used in writing letters.

3. Maria is technically asking about how her job at the office has been currently, she's hoping that Aelia is doing pretty well at her work office.

4. If I were Aelia, I would write the following letter..

Dear Maria,

(Insert Address)

Wow, yea it's been a while since we saw each other. I can't wait to see you once more again. Work in my office as been pretty sufficient and I am very well in the office. Can't wait to talk about how work has been going. I also hope that you have a great time in your holidays. Thank you for reaching out to me and can't wait for some gifts from your vacation!

Sincerely, Aelia

P.S. Hope this helps, Keep Getting Motivate in Learning English!

- Onigiri