Need help with 2.4. Please explain the steps

2.3 2.4 Which function grows faster: N log N or Nl+e/VlogN E > 0? Prove that for any constant k, logk N = o(N). Find two functions f(N) and g(N) such that neither f(N) = O(g(N)) nor g(N) = Of(N)). 2.5 [