1. Are the number of telephone numbers within a particular area code determined by permutations, combinations, both, or neither? Are there any restrictions? Explain your answer with details.
2. Think about setting up a code for24" style="max-width: 720px; height: auto; vertical-align: middle; border: 0px;">2424letters (all of the letters in the alphabet except forOandI) with a two-number code for each letter. What are the pros and cons of assigning codes randomlyvs. systematically?