A schedule of machinery owned by Bramble Corp. is presented below:

			Estimated		Estimated
	Total Cost		Salvage Value		Life in Years
Machine X	$580000		$41000		14
Machine Y	792000		78000		10
Machine Z	283000		58000		6

Bramble computes depreciation by the composite method. The composite rate of depreciation (in percent) for these assets is

8.91.

13.62.

10.11.

8.51.