PPT Slide
Note that neither plan has an IRR.
IRR is the discount rate that equates the PV (inflows) to the PV (outflows).
Since there are only outflows, there can be no IRR (or MIRR).
Similarly, a meaningful NPV can only be calculated if a project has both inflows and outflows.
If CFs all have the same sign, the result is a PV, not an NPV.