I have created several skills for alexa that use more advanced features than this skill will require. I will give you the final, tested source code or setup the skill completely.
Relevant Skills and Experience
I already have a few publicly available alexa skills (Satellite Finder, Decisive Diner, and Item Tracker) that are more advanced than the trivia app.
Proposed Milestones
$40 USD - Start Work
$43 USD - Delivered Source Code
Additional Services Offered
$25 USD - Upload code to your AWS Lambda and setup skill on your developer account.
$10 USD - Integrate an analytics service