Find the x-values of all points where the function has any relative extrema. Find the value(s) of any relative extrema.
f(x)=12x+13x¹²/¹³
Select the correct choice below and, if necessary, fill in any answer boxes within your choice.
A. The function has a relative maximum of ____ at x = _____ and a relative minimum of ____ at x = _____ (Use a comma to separate answers as needed.)