I'm sorry if I'm asking to much, but can I get a hint on how to find Michelle's 5 special numbers?
In her notebook there's a note with a clue that her passwords are five numbers of her favorite number. Asking her about art she tells you about the number Phi that's the golden ratio number - she will tell you the whole number. From this is to be deduced that here password probably is the first five numbers of Phi without the decimal point.