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**luckyc1423** For each of these sets for their, supremum and infimum (if they exist), maximum and minimum (if they exist), interior (explain your reasoning), boundary (explain your reasoning), set of accumilation points (explain your reasoning), closure

and classify each of these sets as open, closed, neither open nor closed, or both open and

closed.

a) [3,5)

b) N --- natural numbers

c) { x is an element of Q: o <= x <= sqrt(2) } = Q and [0,sqrt(2)]

the and means the upside down U