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Write the following in "Roaster" form? ...

Write the following in "Roaster" form?
(a) A=set of the months having 31 days.
(b) B={x : x is a natural number of 2 digits divisible by 13}
(c) C={set of vowels in the word "father"}
(d) `D={x : 5 lt x le 10, x in N}`
E={x : x is a square natural number less than 16}

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