2) Norma - Speak to her and she will return to her father in Windia.
3) Use a Mega Grenade to destroy these barriers
4) Use your Axe to flip the three switches on the 2nd, 4th, and 6th floors to disable Pazuzu's elevator.
5) Elevator - Pazuzu will use this elevator to move between floors until you hit the switches on the nearby floors to stop him. Once you have killed him, the elevator will take you to location 6.
6) The elevator will take you here after you kill Pazuzu.