I have to say far to many players have no idea the answer to their question is already available to them, they just have to look at it. That info is on the unit info sheet available in research but most do not understand it. So I have a simple image that should help you to do so.
"Strategy is the art of making use of time and space. I am less concerned about the later than the former. Space we can recover, lost time never." ~ Napoleon Bonaparte
"Anyone who has to fight, even with the most modern weapons, against an enemy in complete command of the air, fights like a savage against modern European troops, under the same handicaps and with the same chances of success." ~ Erwin Rommel
"Anyone who has to fight, even with the most modern weapons, against an enemy in complete command of the air, fights like a savage against modern European troops, under the same handicaps and with the same chances of success." ~ Erwin Rommel