Theophylline, an asthma medicine, is to be prepared from an elixir with a drug concentration of 5 mg/mL and a cherry - flavored syrup that is to be...

Theophylline, an asthma medicine, is to be prepared from an elixir with a drug concentration of 5 mg/mL and a cherry - flavored syrup that is to be added to hide the taste of the drug. How much of each must be used to prepare 50 milliliters of solution with a drug concentration of 1 mg/mL?