Question 2. Not The Harmonic Series (Show Working) Let A C N be the set of natural numbers whose normal, whole number decimal represen-tation does not include the digit 9. (a) Show that \sum_{\substack{10 \leq n \leq 88, n \in A}} \frac{1}{n} \leq 8 \times \frac{9}{10} \text { (b) Doe: }>\text { coiverge? } Prove your answer. [The order of summation is the natural order on A, inherited from N.]at.