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Mathematics, 03.02.2022 02:10 Nonniel0v3

Several friends are standing near the middle of a long line waiting to enter a stadium to hear a concert. The friends have the following order in line: Jacqueline, Bill, Sally, Al, Dominique, Travis and Beatrice, where Jacqueline is ahead in line and Beatrice is behind. While waiting in the line, Al gets a call from his friend Rolando, and Rolando excitedly tells Al that he is the 9th person in line. Al replies that he has no idea what place in line he is, since the line is so long he can't see the front of it. Let f be the function that, to each positive integer n, assigns the first letter in the first name of the nth person in line. Let us agree to say that Al is in position k in line, since we have no idea what his exact position in line is. Required:
a. What is f(7)?
b. What is f(6)?
c. What is f(k+1)?
d. What is f(k-1)?

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