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

For fixed z and a=2, b=2

For fixed z and a=2, b=11/5

For fixed z and a=2, b=12/5

For fixed z and a=2, b=13/5

For fixed z and a=2, b=14/5

For fixed z and a=2, b=3

For fixed z and a=2, b=16/5

For fixed z and a=2, b=17/5

For fixed z and a=2, b=18/5

For fixed z and a=2, b=19/5

For fixed z and a=2, b=4

For fixed z and a=2, b=21/5

For fixed z and a=2, b=22/5

For fixed z and a=2, b=23/5

For fixed z and a=2, b=24/5

For fixed z and a=2, b=5

For fixed z and a=2, b=26/5

For fixed z and a=2, b=27/5

For fixed z and a=2, b=28/5

For fixed z and a=2, b=29/5

For fixed z and a=2, b=6