Rational Function: C(t)=(50t)/(t^2+25)

a.)Find the time at which the concentration is highest. Please explain and show work completely. Note: Don't answer the statement based on the graph of the function or by inserting a table to find the time.Also, using any other methods from another course such as Calculus is not allowed.The only hint is to apply the local/absolute minimum and/or local/absolute maximum to find the time when the concentration is highest.

(Please explain how the problem was solved step by step.)