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[file:2.pdf](2.pdf)❌

2

• Lower bound \(\ge 0\)
• Lower bound \(\ge support(AB) + support(AD) - support(A) = (3 + 2 - 5) = 0\)
• Lower bound \(\ge support(AB) + support(BD) - support(B) = 3 + 0 -3 = 0\)
• Lower bound \(\ge support(AD) + support(BD) - support(D) = 2 +0 - 2 = 0\)
• Max(lower bound) = 0
• upper bound \(\le support(AB) = 3\)
• upper bound \(\le support(AD) = 2\)
• upper bound \(\le support(BD) = 0\)
• Min(upper bound) = 0
• \(0 = 0\) so it is derivable