Question: Hi there I need help with this question. The reference is WCLN. thanks! Proficient = 4 Exemplary =5 12. Determine n for the arithmetic series

Hi there I need help with this question. The reference is WCLN. thanks!

Proficient = 4 Exemplary =5 12. Determine n for the arithmetic series given the following values, n is equal for both S,, and t. S = 561, t =71 and a = 31 d = tz - t, - 71 - 31 d = 40 -71 12) Self Assessment No Attempt = 0 Beginning = 1 Emerging = 2 Developing = 3 Proficient = 4 Exemplary =5 Page 7 of 16
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