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    (a) Give all primes p, if any, for which p
    2 + 2 is also prime.
    (b) Find 5 consecutive composite integers. [For example, 8, 9, 10 is a sequence of 3 consecutive
    composite integers, but the integers before and after are both primes.]
    (c) Prove that for each k ≥ 1, there exists a sequence of k consecutive composite integers.
 
 
 
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