how can I solve this True or False questions?

3. Managers would like to enlarge firm size via sequential merger and acquisitions because of the asymmetric info

6. According to MM model, in a perfect capital market, the total value of a firm is affected by the choice of capital structure due to the exist of interest tax shield

7. When a company tends to use IPO as the way to raise capital, the costs of issuing an IPO is very low.

8. An efficient portfolio cannot be diversified further, that is there is no way to reduce the risk of the portfolio without lowering its expected return.

9. The CAPM predicts that a security with a beta of 0 will offer a zero expected return.

10. Because the prices of the stocks do not move identically, the systematic risk can be averaged out in a portfolio.