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20.4

n- f, e- .

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<{S,A,B,C},{A,,Z, a,,z},,S>,

: ={S0.5 Alice B, S0.3 Bob B, S0.1 Eve B, S0.1 I A; A0.3 am working, A0.4 am lazy, A0.4 am tired; B0.5 is , B0.5 can cook; C0.5 reading, C0.1 sleeping, C0.4 working}.

Vi={pi,1,,pi,n} , Vi. i fi. . 20.7 S , . , Eve B 110, I am tired 11 ..

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