A1: You can not

A2: Yes you can, actually you have to dodge the orange lights from the disco ball in order to proceed to the next level. First when you reach abigail's room (number 5) you first dogdge the orange lights you see on the floor circling around. The robots should not fall down from the ceiling. You go towards the switch in the middle of the room where the orange dots are moving. You switch that buttom, as you notice the orange dots change rotation. You must dodge these ones as well, to get to the other switch near the left side next to number 5's leopard print chair (with purple floor lamp) after you did that, the orange dots will change rotation again, once again you must dogde the orange dots again to get to the middle switch in the room. After that, you will go to the dj booth, and turn that switch, follow by dogding the orange disco dots, keep doing this till the camera scene shows like some scorpion robot things on the wall, defeat all of those and then go towards the exit door North of number 5's room. You should be able to exit to proceed on with that level.

A3: You could also enter the invisibility cheat, the easiest way: 151543

A4: Once you enter numbuh 5's room, you have to dodge the moving strobe light circles on the floor to get to the center where there's a switch, that will tell you which switch to pull next. the lights will get faster every round, so you have to be quick.