A portfolio can contain more than two items, such as a mixture of Red, White, and Green. Consider the portfolio that has 40% Red, 50% Green, and 10% White. (a) Find the mean and variance of this...

A portfolio can contain more than two items, such as a mixture of Red, White, and Green. Consider the portfolio that has 40% Red, 50% Green, and 10% White.

(a) Find the mean and variance of this portfolio.

(b) Compare the long-run performance of this portfolio to a Pink.

(c) Is this the best mixture of the 3 investments, from a long-run point of view? (Keep all of the shares between 0 and 1.)