After Graduating from High School, David moves away from home to study at University. One of his letters home reads: Dear Father, University i$ really great. I am making lot$ of friend$ and $tudying very hard. With all my $tuff, I $imply ¢an't think of anything I need, $o if you would like, you can ju$t $end me a card, a$ I would love to hear from you. Love, Your $on. After receiving his son's letter, the father immediately replies by sending a letter back. Dear David, I kNOw that astroNOmy, ecoNOmics, and oceaNOgraphy are eNOugh to keep even an hoNOr student busy. Do NOt forget that the pursuit of kNOwledge is a NOble task, and you can never study eNOugh. Love, Dad