Are there multiple IRRs for the following cash-flow sequence? How many are possible according to Descartes' rule of signs? If =12% per year, what is the ERR for the cash flows of this project? Let MARR =12% per year. There is(are) IRR(s) for the given cash-flow sequence. A maximum of IRR value(s) is(are) suggested by the Descartes' rule of signs. The ERR for the cash flows of this project is %. (Round to two decimal places.)