Company $Z$ is considering an investment project $($project $1)$ with $$100mn$ cash outflow at time $=0$ and $$27mn$ cash inflows each year from year $1$ to $7.$ What is the IRR of the project?

$($Refer to question $8$ above$)$ Company $Z$ is considering another investment project $($project $2)$ with $$60mn$ cash outflow at time $=0$ and $$19mn$ cash inflows each year from year $1$ to $6.$ Assuming projects $1$ and $2$ are mutually exclusive, calculate the crossover rate.