A number is a perfect number if the sum of its factors (other than the number itself) is equal to the number. For example, 6 is a perfect number because its factors sum to 6, that is, 1 + 2 + 3 = 6. An abundant number has factors whose sum is greater than the number itself. A deficient number is a number with factors whose sum is less than the number itself.
a. Classify each of the following numbers as perfect, abundant, or deficient:
i. 12
ii. 28
iii. 35
b. Find at least one more number that is deficient and
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