Suppose another drug is administered intravenously. The concentration c of the drug (in mg/L) in the bloodstream, t hours after it is administered, is modeled by the function: c(t) = 20t / (t²+4)A. Determine when the concentration will be 0.5 mg/L. B. Complete the table representing the concentration of the drug in the bloodstream, t hours after administration. Round to two decimal places as needed. t 0 2 4 6 8 10 12 14 16 18 20 c(t)C. What is a reasonable domain for this function? Justify your answer. D. When must the patient receive the next intravenous dose of the drug in order to maintain a concentration above 1 mg/L and below 8 mg/L? Explain your reasoning.