body {
    padding-top: 60px; 
}

footer {
    margin: 50px 0;
}

div.ex3 {
		    height: 780px;
		    overflow: auto;
}

div.ex4 {
		    height: 670px;
		    overflow: auto;
}

p.pr1 {
	page-break-after: always;
}