Buzz: Product Feedback

I would like to have a way to have questions randomized, but keep a specific question at the end (or sometimes even the beginning) of the assessment. For example, I would typically want a bonus question to be last even though I have the rest of the questions randomized. This is similar behavior to the MC questions where you can make a choice z and it will always be last even though the other answers are randomized.

Maybe instead of a number I could have a question z) or question a) that would not randomize and go to the end or beginning?