Nature Power Company uses the composite method and straight-line depreciation for its power plant equipment. Its Apple River plant, which began generating electricity January 1, 2018, had the following equipment: 
Required:
1. Compute the composite depreciation rate.
2. Compute the average service life.
3. Compute 2018 depreciation.
Definitions:
Light Sleeper
A person who wakes up easily or has difficulty staying asleep through minor disturbances.
Break of Dawn
The time early in the morning when light first appears in the sky, marking the beginning of the day.
Eliminate Surplus Words
The practice of removing unnecessary words in writing to make it clearer and more concise.
Economically
Pertaining to the efficient and prudent use of resources, or relating to economics as a field of study.
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