Problem of the Week

Many thanks to long-time puzzle-solver Ray Kremer for the first puzzle of the Fall semester.

Four Scouts have to cross a dangerous bridge to get to their campground.  It is nighttime and they have one candle between them which will burn for a mere 17 minutes after it is lit.  If the candle goes out once lit, they have no way to re-light it.

The bridge will hold at most two Scouts at a time, and each crossing must take place with the lighted candle.  The candle must be walked across with each group; it cannot be thrown, for example, as it would go out.  Each Scout walks at a different rate, and any two Scouts walking together must walk at the rate of the slower camper's rate.  The Scouts walk at the following rates:
 

Can they make it across, and if so, how?

(There is no "tricky" wording here.  Take the meaning of everything at face value!)

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