Diagram Of A Star Sailboat How Do I Find The Distance Of A Star With Mv= 10 And The Spectral Class Of O On The HR Diagram?

How do I find the distance of a star with mv= 10 and the spectral class of O on the HR Diagram? - diagram of a star sailboat

The star has an apparent magnitude of 10 and a spectral class S in the HR diagram. What is the distance from the star in light years? I know I need absolute size FND, and how? Thank you!