Acombination lock uses three numbers between 1 and 99 with repetition, and they must be selected in the correct sequence. 1. which of the five counting rules is used to find that number? a. permutations rule (when some items are identical to others) b. factorial rule c. permutations rule (when all of the tems are different d. combinations rule e. fundamental counting rule. 2. how many different "combinations" are possible? 3. is the name of "combination lock" appropriate? if not, what other name would be better?