Which of the following represents the series?
-13+(-7)+(-1)+5+11

4
A. Σ - 19 - 6k
k = 0
5
B. Σ - 19 + 6k
k = 1
4
A. Σ - 13 - 6k
k = 0
4
A. Σ - 13 + 6k
k = 1

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