Suppose that a new technology, nuclear fusion, makes it much cheaper to generate power. Would this development cause a shift in the short-run aggregate supply curve (SRAS), the long-run aggregate supply curve (LRAS), both, or neither

You hold a diversified $100,000 portfolio consisting of 20 stocks with $5,000 invested in each. the portfolio's beta is 1.12. you plan to sell a stock with b = 0.90 and use the proceeds to buy a new stock with b = 1.50. what will the portfolio's new beta be? do not round your intermediate calculations.