How to configure array for UAG 2010 with topology Between a frontend firewall and a backend firewall

Hi,

We want to publish exchange 2013 through UAG 2010. What is the best topology for UAG 2010?

Can we configure UAG 2010 arrawy with topology "Between a frontend firewall and a backend firewall" ?

Can we configure UAG 2010 array in workgroup?

What is the drawback to use ARR to publish exchange 2013?

Thanks

Jitender 

jitender