Doug spends three hours every Saturday morning mowing the lawn while his son, Michael, watches cartoons on TV. The last time that Michael tried to mow the lawn, it took him three hours to complete half the job. Still, Doug figures that if he borrows his neighbor's lawn mower and he and his son work together, this will give his son a sense of accomplishment and a positive work ethic. a. Since Doug is able to mow the whole lawn in 3 hours, what fraction of the lawn can he mow in 1 hour?