For fixed z and a=3, b>=a

For fixed z and a=3, b=3

For fixed z and a=3, b=16/5

For fixed z and a=3, b=17/5

For fixed z and a=3, b=18/5

For fixed z and a=3, b=19/5

For fixed z and a=3, b=4

For fixed z and a=3, b=21/5

For fixed z and a=3, b=22/5

For fixed z and a=3, b=23/5

For fixed z and a=3, b=24/5

For fixed z and a=3, b=5

For fixed z and a=3, b=26/5

For fixed z and a=3, b=27/5

For fixed z and a=3, b=28/5

For fixed z and a=3, b=29/5

For fixed z and a=3, b=6