We have

A =
  0.04  
  0.72  
0
0.04

Therefore,

I-A =
  1  
  0  
0
1
-
  0.04  
  0.72  
0
0.04
=
  0.96  
  0.72  
0
0.96

Its inverse is then computed to be

  25/24  
  25/32 
0
25/24


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