Correct tense

1. If I were you, I ______ (not do) it
2. Your father tells me you ___ (work) in a bank now.
3. I ___ (write) the letter last night.


REQUIRED URGENTLY

Here are your answers:
1] If I were you, I would not/ wouldn't do it.
2] Your father tells me you work in a bank now. { however I feel the question is wrong}
    The right question with the answer would be:
    Your father told me you work in a bank now. [ But this also contradicts reported speech]
3] I wrote the letter last night. 

Regards.