The prefix would be epi-, as in epidermis. (The outer layer of skin)
I believe that the closest synonym for the word overwhelmed is awestruck. It isn't jubilant, because that means happy. And overwhelmed isn't necessarily happy, it is just a strong emotion. Flattered and gracious just don't fit here.
Answer: Write the speech about the students' good qualities such as their manners,behaviours,and attributes.
Explanation: