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suppose the market portfolio is equally likely to increase by 13% or decrease by 1%. a. calculate the beta of a firm that goes up on average by when the market goes up and goes down by when the market goes down. b. calculate the beta of a firm that goes up on average by when the market goes down and goes down by when the market goes up. c. calculate the beta of a firm that is expected to go up​ 4% independently of the market.