Update Quest1.md

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@ -117,9 +117,11 @@ This is called a _sigma type_, which has three interpretations:
- the total space of the bundle `isEven` over ``,
which is the space obtained by putting together all the fibers.
Pictorially, it looks like
<img src="images/isEvenBundle.png"
alt="SigmaTypeOfIsEven"
width="500"/>
which can also be viewed as the subset of even naturals,
since the fibers are either empty or singleton.
(It is a _subsingleton bundle_).