Well normally it depends on what kind of cake it is but there is a couple I know 1) stick a tooth pick in the center if it comes out clean it means the whole thing is done. 2) if the edges turn brown I hope this helps some.
Lack of sleep would definitely affect her overall performance and mental well-being sleep is like recharging the brain you need rest to function properly at important places such as work, school, sports, ETC
Having an equal net income and outcome would result in a lack of profit thus making it attainable but not desireable