The Center for Disease Control launched a campaign aiming to vaccinate 70% of the population against flu. At the end of the campaign, CDC randomly tested 1000 individuals and found that X of them were vaccinated. After conducting a hypothesis test, CDC announced that they were 95% confident that the campaign's goal had been met.

1. Write down the null and alternative hypotheses for testing.
2. What is the range of X that can support the CDC's announcement about achieving the campaign goal?