It's a good letter, Dawood, but you need to say what about U-Calgary you are interested in, in a very specific manner. Also, please note that Western intellectuals have viewed the question of 'why' as both naive and unanswerable for about a century, and usually prefer to answer 'how' and 'when' and under which circumstances. You may want to see Max Weber's three scientific methods to understand how this attitude came about, and rephrase your letter in a way that will impress university types a little more.