I was asked to use the following format for my report in Overleaf
Please use the following set-up within LaTeX:
\documentclass[12pt]{report}
\usepackage[y4project]{edmaths}
You can download the style file here: https://info.maths.ed.ac.uk/assets/files/Projects/edmaths.sty
This is a .sty file,I am not sure how to implement it.
Thanks a lot!
Edit: Error looks like this

\begin{document}Hello World!\end{document}after those two lines. You may have to refer to your instructor's guidelines about how to use the package to write your report. – imnothere Feb 11 '18 at 14:52