\usepackage[utf8]{inputenc}
\usepackage[scaled]{helvet}
\renewcommand\familydefault{\sfdefault} 
\usepackage[T1]{fontenc}
\usepackage{wrapfig}
\usepackage{setspace}
\usepackage{multicol}
\setlength{\columnsep}{1.5cm}
\usepackage{xspace}
\usepackage{tikz}