What can you conclude by the application of Descartes and Norstrom rules to the following cash flows? EOY NCF 0 $100 1 $800 2 $600 3 $900 4 $950 5 $700 6 $700 Descartes' rule implies there are either 6, 4, or 2 IRR greater than-100% and Norstrom is inconclusive Descartes' rule implies there are either 6, 4 or 2 IRR greater than-100% and Norstrom confirms a unique root greater than 0% Descartes rule implies there are either 4 or 2 IRR greater than-100% and Norstrom is inconclusive Descartes rule implies there are either 5.3. or 1 IRR greater than-100% and