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 
 1 7 L 	 1 8 B 	 r a t i o 	 M 1 7 L 	 M 1 8 B 	 D 1 7 L 	 H e t 1 7 L / 1 8 B 	 D 1 8 B 
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 3 0 	 4 0 	 0 . 7 5 	 0 . 1 3 0 	 0 . 4 8 2 	 0 . 0 0 0 	 0 . 1 2 6 	 0 . 2 6 2 
 
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 
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 
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 
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 
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