Regarding the Demographic Transition Theory, consider the following statements:

1. The first stage has high fertility and high mortality because people reproduce more to compensate for the deaths due to epidemics and variable food supply.

2. Fertility remains low at the beginning of the second stage but it increases with time which is accompanied by an increased mortality rate.

3. In the last stage, both fertility and mortality increase considerably which leads to the population being either stable or growing slowly.

Which of the statements given above is/are correct?