Can someone help me solve A$-$C please!!

You are choosing between two projects. The cash flows for the projects are given in the following table $($ $ million$)$:

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

b$.$ If your discount rate is $4\mathrm{.}6\%,$ what are the NPVs of the two projects?

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