Need Matrix help!

[Sweatyapples]

.

 

[stapel]

7.5% of baby rabbits become middle-aged rabbits
11% of middle-ages rabbits become adult rabbits
2% of baby rabbits die
1% of middle-aged rabbits die
2.5% of adult rabbits die.

I've then changed this into matrix form, such that (sorry im not sure how to do matrices in this forum) :

From
C Y A To
0.905 0 0.03 C
0.075 0.88 0 Y
0 0.11 0.975 A

For what do "C", "Y", and "A" stand? Thank you!

 

[Sweatyapples]

sorry, C stands for 'baby rabbits', Y stands for 'middle aged rabbits' and A stands for ' adult rabbits'