The role(s) of kingship in ancient Sumerian society.

Citing specific evidence from Gilgamesh (not from the textbook), explain the role(s) of kingship in ancient Sumerian society. In other words, one might ask, what were the duties of the king, or what was a Sumerian king expected to do, or what were some of the characteristics of kingship in Ancient Mesopotamia? https://www.ctevans.net/Nvcc/HIS101/Notes/Gilgamesh.html