should be the individual who has made the most contributions to the research, writing, and analysis
who makes the most contributions in terms of experimental work, writing, and manuscript proofing
author of the research publication, who is typically a supervisor or PI of research project.
author is a senior researcher or academician experience, such as a senior professor or principal investigator (PI).
gave advice for the research project, helped frame it, and oversaw the work
made a substantial contribution to the research, data analysis, and writing but is not credited or named in the acknowledgements or author's line