Here is field


X X X D
X X X X
F X X X
A F X X

where A is the attacker and F are friendly figures and D is the defender and X is a block of clear terrian

does A have a line of fire to D

if yes it would be helpful to tell me where I can find this information thanks

No - the 2 friendly figures block line of sight.

Unless Trick Shot or Pulse Wave are involved, line of fire through characters is always blocked. Since the line of fire would pass through the two characters at the diagonal, the two characters create a blocking line.