You are a manager of a drug manufacturer and studies how a new drug behaves in patients. He compares two does: 5 mg and 10 mg. The drug can be administered by injection, by a skin patch, or by intravenous drip. Concentration after 30 minutes may depend on both the dose and the method of administration. a. Sketch the treatments formed by combining dose and method. b. Explain a completely randomized design for this two-factor experiment. c. What can you say about using larger groups of subjects?