How would I go about sending a "Yes or No" prompt from my Arduino Uno to My Phone?

The aim for this forum is to help new members to grow in programming. Designing projects is not what forum does.
You have a job to do for Your school. Forum is not doing it.
Take a look here what forum asks You to supply us with: How to get the best out of this forum - Using Arduino / IDE 1.x - Arduino Forum