M2 + 2d + 8 + d
5(2) + 2(4) + 8 + 4
10 + 8 + 8 + 4
10 + 16 + 4
26 + 4
30
117 times 100 11700 then divide by 200 which is 58.5 %
So, we know the sum of the first 17 terms is -170, thus S₁₇ = -170, and we also know the first term is 2, well

well, since the 17th term is that much, let's check what "d" is then anyway,
Yes but In the bigger group each person would have less