Lisa runs a 5-mile race. For the first 2 miles, she runs at a pace of 6 miles per hour. For the next 2 miles, she slows down to a pace of 4 miles per hour. For the last mile, she sprints at a pace of 8 miles per hour. How long does it take Lisa to complete the race, in minutes? Let's think step by step and output the final answer within \boxed{}.
user