With Ø denoting the empty set as usual, let U = R the union of {Ø, infinity} be

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With Ø denoting the empty set as usual, let U = R the union of {Ø, infinity} be the universal set, with subsets
A = {a is an element of U : 1 = a < 10}, B = {Ø}, and C = {infinity}. Answer true or false. If false, explain why.
(a) Ø is an element of U
(b) every element of Ø is an element of U
(c) every element of R is an element of U but R does not equal U
(d)  is an element of U
(e) is not an element of A
(f) Ø is an element of A
(g) every element of Ø is not an element of A
(h) A is the union of B is the union of C = U
(i) B = Ø
(j) Ø is not an element of B
(k) every element of A' is an element of B'
(l) B' intersected with C' = R

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