How will you instruct the family member to safely administer the drugs?

A 9-month-old infant weighing 20 pounds comes to the emergency department with a 3-day history of vomiting, fever greater than 102.5 °F, and significant pain. Physical assessment reveals acute otitis media, for which the doctor prescribed amoxicillin 500 mg three times a day for 5 days and ibuprofen 2.5 ml every 6 hours. 1. How will you instruct the family member to safely administer the drugs?