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Consider the following stocks in a portfolio Stock 2 Amount Invested $500,000 500,000 500,000 500,000 Beta 0.6 1.0 1.4 1.8 4 The risk-free rate is 6 percent and the portfolio's required rate of return is 12.5 percent. You want to sell all of your holdings of Stock 1 and use the proceeds to purchase more shares of Stock 4 (i.e., the amount of fund previously invested in stock 1 is now invested in stock 4). What would be the portfolios required rate of return following this change