1. (4 marks) A patient stays in the hospital for 10 days. On the first 5 days, she gets more and more sick. After a series of misdiagnoses and wrong treatments, the patient is diagnosed with a staph infection. The patient is then treated with antibiotics, which clears the staph bacteria from her body. After the bacteria is gone, the patient is discharged. of time? During the patient's hospital stay, is the number of staph bacteria in her body an invertible function Fill in exactly one option for this question.