hi LKH22EMW
welcome to the forum
I hope that you enjoy your stay here with us.
Here is the AOS Culture sheet link you can download the Phal to your pc.
http://www.aos.org/aos/orchids/page01.aspx
It was nice of your friend to look after your orchid for you but orchids can not be treated just like any other house plants they need the right care.
I am thinking with 3 of the 4 leaves looking like that I wonder what the roots look like.
have you taken the orchid out of the pot to have a look at the roots to see if they are healthy or if they are rotten.
you can also cut the old flower spike off about an inch from the base of the spike.
please let us know what the root system looks like and what potting medium your orchid is planted in.