Answer right or wrong. If the answer is wrong, provide the correct answer

please

1- The benefit curve for the investor avoiding the risk is more severe than the benefit curve for the investor who takes the risk. ( )

2- The investor who takes the risk chooses a portfolio that has little return if his risk is low ( )

3- In the effective portfolio management strategy, the manager attempts to repeat the performance of the indicator ( )

4- The optimal portfolio of the investor taking the risk lies in a point of contact between the effective limits and the benefit curve according to the highest possible level of benefit. ( )

5- Tilt the effective boundary curve steadily as we move downward ( )

6- A portfolio is considered effective only if no second portfolio has the same return but has a lower risk level ( )

7- If you want to study the effect of adding shares on the portfolio, you should only consider the correlation factor of the new stock with other stocks ( )