A drug’s concentration in a patient’s blood, in micrograms per milliliter, can be modeled by the function where $t$ is the time, in minutes, since the drug is injected. 1) The drug’s concentration will be milligrams per milliliter $25$ minutes since the injection. Round your answers to two decimal places if needed. 2) When the drug’s concentration decreases to $0.55$ milligrams per milliliter, it’s time to give the patient another injection. The nurse should wait for minutes before another injection. Round your answers to an integer if needed. 3) If no re-injection is applied, in the long term, the drug’s concentration will be milligrams per milliliter.