Single variable optimization

I also got problem with this one

Consider the function ln(x) + x/4 where 1 <_ x <_ 10

a) Find all stationary points for f(x)

b) Find all local extreme points and calculate local extreme values (ln (10) = (almost equal) 2.303)

c) Calculate the second derivative and determine if the function is concave or convex on its

domain. If not, where is it convex and where is it concave?

First i have to derivate

Then i get 1/x - 4x^-2 = 0

How do i go further now?

Thanks for the help