When it comes to building investment portfolios, the investors care about the efficient frontier. Discuss efficient frontier and explain its dynamics with respect to including more stocks. (100-200 words)

(ii) How should an investment strategy look like in the presence of a positive alpha? (100-200 words)

43. ) Can the market portfolio proxy be inefficient? Why? Why not? (100-200 words)

(ii) Tesla was supposed to launch its SpaceX in 2019 with a total cost of $ 5 billion. The project, however, was postponed to 2020, and the cost jumped up by 15%. Assuming that the borrowing cost was 3.5% in 2019, how much did the postponement cost Tesla. You need to calculate the cost of postponing the project.