About the blue:Pretty much in line with NatJ except I don't think you have any actual Blue genetics in your flock. As he said in that other post a RIR rooster over an Australorp does not give you blue genetics. I don't think you'd see any blue chicks.
I haven't been quite sure whether @valesmichelle has some blue hens (but received incorrect information about their parents), or black hens (mistakenly called "blue").
It can be settled by looking at the hens themselves:
If the hens do show blue, they can produce blue chicks.
If they show black and not blue, then they can not produce blue chicks.