Write the next sentence in the following story.

A man gives a tutorial on how to change a bike tube. The wheel is taken off, tire irons are put in, and the tube is removed. a new tube

Select from the following. (i). is inserted and is pumped up.; (ii). is placed, wheels are removed, and two toilet flushes are to be cleaned.; (iii). is installed, set up and flipped over to remove any damaged nut.; (iv). is inflated with oil, another tube is taken off, and a new tube is inflated, then the first one.;. The answer should be
(i).