[Coordinated fire line of sight?]

Does coordinated fire require line of sight?

 

scenario: Rex (bottom left corner) is shooting maul. He is at range of both 501st and 212th but there is a mountain in the way. Is line of sight required

[How many hunker tokens stack?]

Reading the rules, it doesn’t say that there is a limit to cover, however it does say:

 

Units can also gain Cover from Hunker  tokens. Each Hunker token a Unit has grants characters in that Unit Cover [1] .
 

so if a unit got 3 hunker tokens, would that give them cover 3, coinciding with the ‘gar Saxon would have sharpshooter 3” earlier in the rules? Or does cover cap?

[5 dice attacks]

Can 5 dice attacks be modified, for example with focus tokens or through abilities such as kalani’s target, concentrate all fire power, or mauls revenge, I must have revenge and sustained by rage to have additional dice, or is it simply a 5 dice attack regardless