Which of the following statements are correct?

1. If you found a stock with zero historical beta and held it as the only stock in your portfolio, you would by definition have a riskless portfolio

2. the Beta coefficient of a stock is normally found by regressing past returns on a stock against pat market returns. if a stock has a beta of 1.0, then its required rate of return would be equal to the risk free rate of return

3. the Beta of a portfolio of stocks is always smaller than the Betas of any of the individual stocks

4. if a newly issued stock does not have a past history that can be used for calculating beta, then we should always estimate that its beta will turn out to be 10