Which, if any, of the following statements is true in the Solow model:

1) A higher saving rate expands the steady-state of capital stock, thus affecting the steady state of the output and the steady state growth rate.

2) A higher rate of population growth necessarily generates a larger steady state of capital accumulation per worker.

3) None of the other possible answers.

4) A higher saving rate leads to a higher output and an improvement of society's well-being.