random walk. by a complicated set of deals, you have arranged that after 28days you will gain £f(Y(28))=£(5-|Y(28)+3| million. thus is Y(28)=-2 you gain £4 million Y(28)=5 you lose 3 million and if Y(28)=2 you break even
estimate your gain using mathematica for y=1,2....28
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