Trouble Creating

How would I draw this image using TikZ.

I have tried using curved lines, but I can't seem to get the details as accurate as they need to. The preamble to the document is:

\documentclass[12pt]{article}
\usepackage[reals]{layout}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{amsthm}
\usepackage{enumerate}
\usepackage{graphicx}
\usepackage{mflogo}
\usepackage{tikz}
\setlength{\topmargin}{0in}
\setlength{\textwidth}{6.5in}
\setlength{\textheight}{8.3in}
\setlength{\oddsidemargin}{0in}
\setlength{\headsep}{0in}
\setlength{\headheight}{0in}
\setlength{\parskip}{1em}