Tell whether each of the following sets is Well-defined or not.
_____________ 1. The set of admiring places.
_____________ 2. The set of all counting numbers
_____________ 3. The set of workaholic teachers
_____________4. The set of letters in the word "father"
_____________5. The set of all factors of 36
Give the cardinality of the following sets.
_____________1. The set of couting number from 5 to 25
_____________2. The set of letter in the "seven"
_____________3. D = {1,2,3,4,5,}
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