Anadarko Petroleum must choose between two mutually exclusive oil$-$drilling projects, which each have a cost of $$12$ million. Under Plan A$,$ all oil would be extracted in one year, producing a cash flow at t $-1$ of $$16\mathrm{.}0$ million. Under Plan B$,$ cash flows would be $$2\mathrm{.}1$ million for $20$ years. The firm's WACC is $12\%.$ At what rate are the NPVs for these two plans the same? That is$,$ what is the crossover rate where the two projects' NPVs are equal?