The question that states that one of your colleagues constantly complains about everything at work and criticize the leadership and gossip about fellow-coworkers can be resolved by:
According to the given question, it is important to note that the colleague is:
This colleague simply does not want to work and would not let others to work because she is constantly complaining and making unnecessary criticisms.
The best way to resolve this situation is to dialogue and find a common ground. However, if this does not prove to be effective, then more drastic measure should be taken.
Read more about conflict resolution here:
brainly.com/question/20433645
How to Write a Formal Letter?
Address or greet the concerned person properly like Dear Sir/Madam.
Always mention the subject of writing the letter.
Be concise in your letter. ...
The tone of the letter should be very polite and not harsh.
Write in a proper format and take care of the presentation of a letter.
Mention the address and date correctly.