Write a method called dangerousDescent that determines whether there is a downhill section in the hiking trail with a gradient of more than -5%. The gradient is calculated by the rise in elevation over the run in distance. For example, the last kilometer section has a gradient of -1% because the rise in elevation is 40 - 50 = -10 meters. The distance covered in 1000 meters. -10 / 1000 = -1%.

Your method should return true if there exists a dangerous descent in the given array, false otherwise.