The standard deviation of the market-index portfolio is 15%. Stock A has a beta of 2.00 and a residual standard deviation of 25% a. Calculate the total variance for an increase of 0 20 in ts beta. (Do not round intermediate calculations. Round your anawer to the nearest Total variance %-squared b Calculate thetotal variance for an increase of 3.53% in its residual standard deviation. whole number.) (Do not round Intermediate calculations. Round your answer to the nearest Total variance %-Squared