why it's true or false

1- Starting to invest early for retirement increases the benefits of compound interest.

2- If the discount (or interest) rate is positive, the future value of an expected series of payments will always exceed the present value of the same series.

3- The market value of any real or financial asset, including stocks, bonds, or art work purchased in hope of selling it at a profit, may be estimated by determining future cash flows and then discounting them back to the present.