For fixed z and a=2, b>=a

For fixed z and a=2, b=2

For fixed z and a=2, b=17/8

For fixed z and a=2, b=19/8

For fixed z and a=2, b=21/8

For fixed z and a=2, b=23/8

For fixed z and a=2, b=3

For fixed z and a=2, b=25/8

For fixed z and a=2, b=27/8

For fixed z and a=2, b=29/8

For fixed z and a=2, b=31/8

For fixed z and a=2, b=4

For fixed z and a=2, b=33/8

For fixed z and a=2, b=35/8

For fixed z and a=2, b=37/8

For fixed z and a=2, b=39/8

For fixed z and a=2, b=5

For fixed z and a=2, b=41/8

For fixed z and a=2, b=43/8

For fixed z and a=2, b=45/8

For fixed z and a=2, b=47/8

For fixed z and a=2, b=6