a) Find a pair of items, a and b, such that rules {a} --> {b} and {b} --> {a} have equivalent confidences.

b) Use a-priori with a support threshold of 3 to find all of the frequent sets of size 1, 2, and 3.

Basket Number Itemsets {pencils, paper, calculator} 2 {paper, backpack, calculator} {binder, erasers, calculator} {pencils, calculator, backpack} 5 {paper, backpack} {paper, calculator} {binder, erasers, pencils} 8 {pencils, calculator, binder, erasers} 9 {pencils, calculator, binder, erasers) 10 {binder, erasers, backpack}