5. One Saturday, you want to put in 3 volunteer hours at the food bank. You need to be the for dinner
at 6:00 p.m. Your walk to the food bank takes 30 minutes, but you can catch a ride with a friend after
you're done, so it takes only 10 minutes to get home. When do you need to leave for the food bank in
order to get home in time for dinner? Show your work. (10 points)