(6 points) Four prospectors with only one lantern must walk through a mine shaft. At most, two prospectors can travel together and any prospector in the shaft must be with the lantern. The prospectors, named Andrews, Blake, John, and Kelly, can walk through the shaft in one minute, two minutes, four minutes, and eight minutes, respectively. When two walk together they travel at the speed of the slower prospector How can all four prospectors get through the mine shaft in only 15 minutes? Show your work 5. 6. (4 points) Decode the following message: Uc qrsbw fypb Show your work