What else can they do when repaired walls separate from beams or restoring sockets carry no electricity

What correction should be made to this sentence?
1) Insert a comma after walls
2) change the spelling of separate to seperate
3) Change restoring to restored
4) change the spelling of electricity to electricty
5) no corrections necessary

I think its 3, is that correct?

2 answers

Yes, 3.
3 is the answer
100% sure