Question: 1. (a) (2 points) Consider the following zip code: What is the check digit? 20500-0001 I (b) (2 points) Determine the digit x that

1. (a) (2 points) Consider the following zip code: What is the check digit? 20500-0001 I (b) (2 points) Determine the digit x that makes the number 8457938x345 divisible by 9. (c) (6 points) For the following ISBN-10, determine the check digit: 1-4642-2948-?

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