Questions about RIR x Black Australorp hens

[The featherhead]

1. What is their egg production rate
2. How long do they live?
3. How resistant are they to the common poultry diseases?
Thanks to anyone who answers

 

[21hens-incharge]

Both breeds are excellent layers. Australorp are a tiny bit more likely to go broody.
Each bird is unique. I have had Australorp live 7+ years and still laying a decent number of eggs. I am not sure on the RIR expected lifespan.
A good start in life is the best thing to build a healthy immune system. I don't think any breed is particularly resistant just by breed alone.