$($Total $30$ points$)$

This is an unconventional cash flow:

What would be the adjusted cash flow and what is the Modified Internal Rate of Return $($MIRR$)$ if the project's required rate of return is $15\%?$ Utilizing three distinct approaches$-$discounting, reinvestment, and combination$-$to compute the cash flow and MIRR, each method is worth $10$ points.