For fixed z and a=43/8, b>=a
For fixed z and a=43/8, b=43/8
For fixed z and a=43/8, b=11/2
For fixed z and a=43/8, b=45/8
For fixed z and a=43/8, b=23/4
For fixed z and a=43/8, b=47/8
For fixed z and a=43/8, b=6