Let A, B be any two events P(A)=P(1), P(...

Let A, B be any two events `P(A)=P_(1), P(B)=P_(2)` and `P(A nn B)=P_(3)`.Then which of the following are true
`P(bar(A uu B))=1-(P_(1)+P_(2))`
`P[A uu(bar(A)nn B)]=P_(1)+P_(2)-P_(3)`
`P(bar(A)/bar(B))=(1-P_(1)-P_(2)+P_(3))/(1-P_(2))`
`P[bar(A)nn(A uu B)]=P_(2)-P_(3)`

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