5. (18 points) Consider the following contingency table corresponding to two itemsets: A -A Erow B a b atb -B C ctd Ecol atc b+d atb+c+d (a) (6 points) What is Kulc( A, B), the Kulczynski measure between A and B? Show that Kulc(A, B) is null invariant. (b) (8 points) What is Lift(A, B)? Show that Lift( A, B) is not null invariant. Based on Lift(A, B), when will A, B be considered independent in terms of the entries in the contingency table. (c) (4 points) What is the difference between Lift(A, B) and Cosine(A, B)? Why does such a difference make Cosine(A, B) null invariant