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State which of the following sets are fi...

State which of the following sets are finite and which are infinite. Give reasons for your answer.
(i) `A={ x : x in N and x lt 100}` (ii) `B={x : x in N and x le 5}`
(iii) `C={1^(2), 2^(2), 3^(2),....}` (iv) D={1,2,3,4}
(v) {x : x is a day of the week}

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