Consider the concentration, C$,$ in mg$/$liter$,$ of a drug in the blood as a function of x$,$ of the amount, in mg$,$ of the drug given and t$,$ the time in hours since the injection. For $0$ x $4$ mg and t $0$ hours, we have

C $=$ f$($x$,$ t$)=$ te$$t$(5$ x$).$

Find f$(3,2).($Round your answer to three decimal places.$)$

mg$/$liter

Interpret in terms of drug concentration.

The change in concentration of a $3$ mg dose in the blood $2$ hours after injection.The change in concentration of a $2$ mg dose in the blood $3$ hours after injection.$$The concentration of a $2$ mg dose in the blood $3$ hours after injection.The concentration of a $3$ mg dose in the blood $2$ hours after injection.The amount of a $3$ mg dose in the blood $2$ hours after injection.