Fortunately I already met the population requirements before the challenge started, so this challenge was pretty easy. Here are the region pics:
(https://www.sc4devotion.com/forums/proxy.php?request=http%3A%2F%2Fi181.photobucket.com%2Falbums%2Fx91%2FRusty_XL%2FChallenge6A-01.jpg&hash=221437a65d7b2a55a73d54ae67619da159172b3c)
(https://www.sc4devotion.com/forums/proxy.php?request=http%3A%2F%2Fi181.photobucket.com%2Falbums%2Fx91%2FRusty_XL%2FChallenge6A-02.jpg&hash=4e92aa370c5eba9f74cf8ebd9a402ee51754e16b)
And here's a pic showing the population of my largest city:
(https://www.sc4devotion.com/forums/proxy.php?request=http%3A%2F%2Fi181.photobucket.com%2Falbums%2Fx91%2FRusty_XL%2FChallenge6A-03.jpg&hash=db4e72ac30432acf356322d60ba09ff7ba58419e)