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If G is a group of order (p^k)s where p is a prime number such that...

If G is a group of order (p^k)s where p is a prime number such that (p,s)=1, then show that each subgroup of order p^i ; i= 1,2...(k-1) is a normal subgroup of atleast one subgroup of order p^(i+1)

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