Your Company reported the following: Year 1 Year 2 Year 3 Year 4 Margin 4% 6% 5% 8% Turnover ? ? ? ? Average operating assets ? ? ? ? Net operating income $25,000 $25,000 $25,000 $25,000 Sales ? ? ? ? ROI 20% 24% 15% 16% What were average operating assets for Year 4? $125,000 $156,250 O $166,667 $104,167