Consider a transaction that contains the following items: {1, 2, 3, 5, 6}. Using the hash tree constructed in part (a), which leaf nodes will be checked against the transaction? What are the candidate 3-itemsets contained in the transaction?

Consider the following set of candidate 3-itemsets:
{1, 2, 3}, {1, 2, 6}, {1, 3, 4}, {2, 3, 4}, {2, 4, 5}, {3, 4, 6}, {4, 5, 6}

The leaf nodes L1, L2, L3, and L4 will be checked against
the transaction. The candidate itemsets contained in the transaction
include {1,2,3} and {1,2,6}.