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Here is the code that I am using. My questions are below.

\documentclass[12pt]{article}
\usepackage{titlesec}
\usepackage{titling}
\usepackage[margin=1in]{geometry}
\geometry{headheight=15pt}
\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyhf{}
\renewcommand{\headrulewidth}{0pt}

\usepackage[T1 ...