Assault vs AI - too many mines ?

[desh44]

DRG
A few quick questions concerning mines. What is the percentage chance of a unit setting off a mine. when I play if there is single mine marker in a hex it almost always will kill a vehicle if each marker represents 10 mines does this mean that there are 10 of each type of mine (anti vehicle and anti personnel). Also when a mine had detonated does is the number of mines reduced in the hex. and one last question does artillery fire into a hex have a chance of detonating mines (how about FAE's or napalm)?

Thanks for any info
Tom D