Atomic spectroscomy, jj coupling

[Irid]

This is rather a straightforward question I believe, but somehow I'm not sure about the wording of it...

Homework Statement

Calculate g value (Landé g factor) for sd configuration in jj coupling.

Homework Equations

[itex]
g = 1 + \frac{J(J+1) - L(L+1) + S(S+1)}{2J(J+1)}
[/itex]

The Attempt at a Solution

For a d electron there are two j-values: 3/2 and 5/2. And then both can couple with the s electron to give 2/2, 4/2 and 4/2, 6/2 total J. So how can I calculate the g factor, there are many possibilities, correct?

 

[Irid]

And one more.
The normal Zeeman components of a 500nm spectral line are 0.0116nm apart in a magnetic field of 1.0T. Find the ratio (e/m) of an electron.

I think I should somehow find out what is g-value to be able to proceed, but how?