The drug stock concentration is 10 milligrams/ml (10mg in a 1ml ampoule). To prepare a one milligram/ml solution (1mg/ml), the volume of saline (in millilitres) you would add to the 1ml stock solution of the drug = 9 ml. To administer fifty micrograms per kilogram (50ug/kg) to a child weighing 25 kilograms (25kg), the total amount of the drug you need in milligrams = mg. The volume of the 1mg/ml solution you need (in millilitres) = ml. (provide a numerical answer)