Explain how the resistance to penicillin affects the S. Taphylococcus aureus population. In your answer, be sure to include an explanation of 1. How the exposure to penicillin affects the survival of some bacteria in the population 2. Why the frequency of penicillin-resistant bacteria can change over time within the population 3. How it is still possible to cure patients who are infected with penicillin-resistant bacteria.