For fixed z and a1=-7/2, a2=-7/2, b1>=-11/2
For fixed z and a1=-7/2, a2=-7/2, b1=-11/2
For fixed z and a1=-7/2, a2=-7/2, b1=-9/2
For fixed z and a1=-7/2, a2=-7/2, b1=-7/2