Theragen Dose-Response 5-Day Mortality in Rats 100 III 80 60 Mortality (%) 40 20 1 0.1 0 0.2 0.4 0.5 0.3 Dose (mg/kg) a) Can the mortality risk associated with this compound be reasonably described using a linear model? If so, then roughly describe the model (eg, start and end points of the straight line) including any important features. If not, then explain why not. (1.5) b) An adult male weighing 90 kg and a 5-year old child weighing 18 kg both ingest a total of 12 mg of Theragen. Is their subseques risk of death the same? Explain. (1.5)