Michaela spent 5/6 of an hour reading on each of 3 days this week. she spent 3/4 of an hour on each of 2 days this week doing science. she spent 1/2 of an hour on each of 4 days this week doing math. milana said she spent 5 1/2 hours doing reading, math, and science this week. michaela said that she spent 2 1/2 hours doing reading, math, and science this week. who is correct? what mistake did someone make? explain your thinking and draw models to support your answer.