+9 There are \(3\) geese sitting equally spaced along the perimeter circle with a radius \(2\) meters in the water. The sound waves from their honks travel uniformly radially outward. Geese A honk is \(85\) decibels from 5 meters away. Geese B honk is \(87\) decibels from 5 meters away. Geese C honk is \(89\) decibels from 5 meters away. The geese honk one after another. A bird 18 meters above the centre of the the circle hears the honks.
From the bird's point of view, what is the sum of the decibels of the honks?
