You have to choose between two mutually exclusive investments:

a$.$ Calculate the Internal Rate of Return for each of the two projects.

b$.$ What project would you choose if the opportunity cost of capital is $5\%?$ Why?

c$.$ For what range of values for the opportunity cost of capital would you choose project A

and for what range of values would you choose project B$?$

Please show me the math I don't wanna see an excel