Assume that there are 3 firms in an industry for which you wish to compute an industry

beta. The betas of these 3 firms are 1.1, 1.2, and 1.4.

a. What is the beta of an equal-weighted portfolio of the 3 firms?

b. If the market capitalizations of the 3 firms are $100 million (beta 1.1), $200 million (beta

1.2), $300 million (beta 1.4), what is the beta of a market capitalization value-weighted

industry portfolio.