Concept:Find the digit assigned to each word by matching common words with common digits in the given codes.Explanation:Compare “who are you” = 432 and “they is you” = 485.Common word is “you”, common digit is 4, so you = 4.Compare “they is you” = 485 and “they are dangerous” = 295.Common word is “they”, common digit is 5, so they = 5.Compare “who are you” = 432 and “they are dangerous” = 295.Common word is “are”, common digit is 2, so are = 2.In “they are dangerous” = 295, they = 5 and are = 2.Therefore, dangerous = 9.