Question about EVAL-ADF4351 and EVAL-ADL5610

Hi,

I have two questions about these two evaluation boards. Please take a look at attachement.

1): What is the each distance between L1 and L2(=a), L2 and L3(=b), and L3 and L4(=c)?

2): What is the each PCB material?

Regards,

Kazu