This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to make an ironing board cover from scratch
If your foam underneath is ripped or scruffy, you should replace that as well.
One thing that you can try is upholstery wadding underneath.
Untie the cord from underneath the existing cover (it is probably wrapped around a plastic toggle.

pick from the following. [i] ) when you make sure no one is looking at the cover, undo it by running a clean knife over the cover. Just ease out and see what you've done right! It is pretty easy now. [ii] So if it is tied when you unscrew it that is quite difficult and it might break from being so loose over time, give it a rest until you can continue. ) Wrap all 4 edges tightly on top of the cover, without leaving any gaps. [iii] ) Loosen the screw on the compartment where it comes out. You should notice why this takes a lot of work. [iv] If it is, good, you have half of your materials already). Pull all the string out, and stretch the cover out flat.
The answer is:
[iv]