1,most students expect that if they spend more time studying, the outcome will be improved grades in the course. This supposes that. Please make small ans 2,a person behaving rationally will. Please make ans. 3, Economics is concerned with what? 4,your mother tells you, watching ten hours of tv per day will make you stupid this is a positive statement because.5,economics is most important concerned with. 6,An economic theory, please give me idea