Trying to convert a small storage room to a bathroom with toilet, sink and shower. One wall is an exterior wall of the house with a small window in the center. The door will be on the wall opposite this window. Is htere a "standard" placement for these three fixtures in a 5 x 5 bathroom? I have done some looking and found the smallest stall shower is 32" x 32", but a corner shower is 36 x 36. If anyone has come across a project like this, I would appreciate any help you could offer