Year Cash Flow for

Germanium Mine $($$ Million$)$ Cash Flow for

Gallium Mine $($$ Million$)$

$0-440-625$

$153-100$

$285-50$

$3120765$

$4145515$

$5175330$

$6120255$

$795215$

$886190$

$9-7010$

$10--325$ calculate the profitability and payback period,discounted payback period,internal rate of return and modified rate of return