There are 4 of us planning to sign a 12 month apartment lease. One of the renters does not want to live there for the summer. Typically, is she responsible for the rent or are the other 3 of us expected to split up her portion of the rent? I honestly don't know how to split this up fairly in this situation. We also pay for utilities, which I don't think she should have to pay for over the summer, but I have never rented before, so I do not know the proper way to split this. HELP ME!