NPV$/$IRR$.$ Consider projects A and B: $($L$08-2)$ Co C$2$ Project A B Cash Flows $($dollars$)$ C $-30,00021,00021,000-50,00033,00033,000$ NPV at $10\%+$$$6,446+7,273$ a$.$ Calculate IRRs for A and B$.$ b$.$ Which project does the IRR rule suggest is better? c$.$ Which project is really better?