Papers on IEEE Xplore or ACM DL Background: I am an undergrad student who took a CS elective.
My software engineering professor has asked us to review a bunch of research papers on certain topics in software development. He specifically wants us to review papers only from IEEE and ACM Transaction papers or conference papers.
I found a paper of interest in IEEEXplore. It says:

Publisher: IEEE

at the top, but below the abstract, it says:

Published in: 2018 Third International Conference on Informatics and Computing (ICIC)

I tried to find more about ICIC but could not figure out if this conference is affiliated to IEEE.
My questions:

Does this count as an IEEE Conference paper?
Can I safely assume that all papers available on IEEE Xplore or ACM Digital Library are published as IEEE transaction or conference papers, and ACM papers respectively?
Does this count as an IEEE Conference paper?

Yes

Can I safely assume that all papers available on IEEE Xplore or ACM
Digital Library are published as IEEE transaction or conference
papers, and ACM papers respectively?

I think so and will be surprised if that is not the case.