Consider the following two projects:

$\backslash$table$[[$Project$,\backslash$table$[[$Year $0],[$Cash Flow$]],\backslash$table$[[$Year $1],[$Cash Flow$]],\backslash$table$[[$Year $2],[$Cash Flow$]],\backslash$table$[[$Year $3],[$Cash Flow$]]],[49$ ers,$-25,5,10,17],[$Chiefs$,-20,10,9,6]]$

a$)$ Given a discount rate of $5\%,$ what is the NPV for project $49$ ers and Chiefs, respectively? Which project has a higher NPV$?$

b$)$ Given a discount rate of $10\%,$ what is the NPV for project $49$ ers and Chiefs, respectively? Which project has a higher NPV$?$

c$)$ What is the IRR for project $49$ers and Chiefs, respectively? Which project has a higher IRR?

d$)$ At which discount rate do these two projects have the same NPV$?$

e$)$ Based on your answer a$)$ to c$),$ what can you say about selecting mutually exclusive projects based on the ranking of projects' IRRs?