Advice needed: should I combine these into one EC on the Common App or separate them?

Applying to College Common and Coalition Application
1

I got into a prestigious summer internship (with an acceptance rate of <5%) and worked on a field-specific project. My professor then invited me to stay on the research team into my senior year to co-author a paper. Not everyone in the program has had this opportunity.

Should I lump these into a single activity called “Research” or split them into two ECs?

2

Your choice

3

The Common App has ten EC spaces. Do you need to condense activities to fit something else in?

4

Split them and or somehow highlight the Research… Nice going BTW!