rovide a counterexample for each of the following statements:
a If p is an odd prime, then p + 2 is also an odd prime.
b For all n ∈ N, if n
3
is divisible by 8, then n is divisible by 8.
c For all real numbers a, b, c and d, if a < b and c < d, then ac < bd.
d For all n ∈ N, the numbers n, n + 4 and n + 6 cannot all be prime.'
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