The concentration of a certain drug in the bloodstream in mg 0 21 can be modeled by the equation C t where fis 1 cm the time since the injection in hours Answer the below questions from when the injection was initial given to 4 hours later Question 1 1 Part A 20 points Use your graphing calculator to graph the function in a reasonable window Sketch your graph on your paper and provide the graphing calculator window you used using the following format xmin xmax ymin ymax Remember to label your axes and include units Upload a PDF of your work in the correct orientation Only PDFs will be given credit Upload a PDF of your work in the correct orientation Only PDFs will be given credit Show all work Question 1 2 Part B 10 points Use your graph to determine the time in hours where the drug concentration was at its maximum Include units and round your answer to 2 decimal places if needed Question 1 3 Part C 10 points On what open interval s is the drug concentration increasing Round your answer to 2 decimal places if needed Put a comma between intervals if needed Question 1 4 Part D 10 points