im not getting this one right either. same type of problem

Show Intro/Instruct A 160 lb hospitalized patient received intermittent intravenous infusions of an antibiotic for a serious and life threatening infection from a burn wound. The patient received 7.5 mg/kg infused over 30 minutes administered every 6 hours. A blood samples was collected 45 minutes before the third infusion was started and the drug concentration was found to be 22.2 mcg/mL. Another blood sample was collected 60 minutes after the third infusion was completed and the drug concentration was found to be 55.8 mcg/mL. Assume steady state was achieved before these samples were collected. What dose should the patient receive in order to produce steady state minimum drug concentrations of 8 mcg/mL? (Note: Please provide your answer in units of mg. Do not include the units in the answer you enter) Points possible: 6 Unlimited attempts. License Submit G Search or type URL 2 1 $ N # 3 4 % 5 6