You are choosing between two projects. The cash flows for the projects are given in the following table$($$ million$)$: Project Year $0$ Year $1$ Year $2$ Year $3$ Year $4$

A $-5025202015$

B $-10020405060$

a$.$ What are the IRRs of the two$$ projects?

b$.$ If your discount rate is $5\mathrm{.}0\%,$ what are the NPVs of the two$$ projects?

c$.$ Why do IRR and NPV rank the two projects$$ differently?