Find the Banzhaf power distribution of the weighted voting system

[29: 20, 16, 13, 8]

Give each player's power as a fraction or decimal value

P1\displaystyle {P}_{{1}} =  
P2\displaystyle {P}_{{2}} =  
P3\displaystyle {P}_{{3}} =  
P4\displaystyle {P}_{{4}} =