Ответ:

1. The letter is to the Leader of the Mahalla Committee "Istiqlol".

2. The letter is from the senior citizens of the mahalla.

3.  It is planned to install a new advertising billboard outside the bank in Navbahor Street.

4. The citizens are against this plan.

5. The letter is formal. It`s clear when we see the greeting and the information which is written in the letter.

6. The writers don`t know the person they are writing to because they don`t write his name.

Объяснение: