IFS function with multiple criteria

I'm trying to write an IFS funtion with values returned on three criterias and I'm having a problem with the second criteria. The first criteria is to return a value if the cell has a value less than or equal to 36, the second criteria is to return a value if the cell is greater than 36 but less than 84, and the last criteria is to return a value if the cell is greater than 84. My problem is I don't know how to write for the second criteria. This is what I have, and yes the middle (2nd criteria) if completely wrong, so don't laugh, I'm really new at formulas. :)

=IFS(N12<=36,"0-3",N12>36<=84,"3-7",N12>84,"7+") 

I really need an answer quickly.

Thank you in advance,

Terrie Grusnis