There are 4 people that need to cross bridge at night. Its dark, so they need a torch to cross the bridge, but they only have 1 torch. The bridge is narrow, so only 2 can cross at a time. Person #1 can cross in 1 minute. Person #2 can cross in 2 minutes. Person #3 needs 5 minutes to cross. And person #4 needs 8 minutes. When two people are crossing at the same time, they move at the pace of the slowest person.

Question: What is the quickest that you can get everybody across the bridge?