People with hypersomnia have difficulty maintaining sleep.

hyper means excessive

hypo means less than, lack of

iso means equal

Explanation:

hypersomnia would mean too much sleep

delegated (sometimes called enumerated or expressed) powers are specifically granted to the federal government in article i, section 8 of the constitution. this includes the power to coin money, to regulate commerce, to declare war, to raise and maintain armed forces, and to establish a post office.