\documentclass[a4paper,12pt]{report}
\usepackage{graphicx}
\usepackage{booktabs}
\usepackage{caption}
\usepackage{subcaption}
\usepackage{mathtools}
\usepackage{url}
\usepackage{footnote}
\usepackage{setspace}
\usepackage{enumitem} \setlist[itemize,1]{label={\fontfamily{cmr}\fontencoding{T1}\selectfont\textbullet}}
\DeclareMathOperator*{\argmin}{argmin}
\usepackage{graphicx,xcolor}