grammar - Should I say "creation of A and B" or "creation of A and of B"? (B being plural)

As a student, I need to write a report about what I accomplished during an internship. I created two things: some indicators (A) and a dashboard (B).
Should the title of my report be "Creation of indicators and a dashboard" or "Creation of indicators and of a dashboard"?

I find "creation of A and B" better, but I'm not really sure, and the fact than the first item is plural while the second is singular makes me hesitate...

I tried to find some help or examples on the Internet, but could only find results about the creation of something, nothing that could help me with the use of this word...