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  For fixed z and a=1/2, b>=a
  
 For fixed z and a=1/2, b=5/8 
 For fixed z and a=1/2, b=7/8 
 For fixed z and a=1/2, b=9/8 
 For fixed z and a=1/2, b=11/8 
 For fixed z and a=1/2, b=13/8 
 For fixed z and a=1/2, b=15/8 
 For fixed z and a=1/2, b=17/8 
 For fixed z and a=1/2, b=19/8 
 For fixed z and a=1/2, b=21/8 
 For fixed z and a=1/2, b=23/8 
 For fixed z and a=1/2, b=25/8 
 For fixed z and a=1/2, b=27/8 
 For fixed z and a=1/2, b=29/8 
 For fixed z and a=1/2, b=31/8 
 For fixed z and a=1/2, b=33/8 
 For fixed z and a=1/2, b=35/8 
 For fixed z and a=1/2, b=37/8 
 For fixed z and a=1/2, b=39/8 
 For fixed z and a=1/2, b=41/8 
 For fixed z and a=1/2, b=43/8 
 For fixed z and a=1/2, b=45/8 
 For fixed z and a=1/2, b=47/8 
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