body {
  background-color: powderblue;
  margin-left: 80px; 
  margin-right: 80px;
  font-size: 18px;
}
h2 {
	text-align:center;
}

p {
	text-align:justify;
}
p.ex1 {
  font-size: 22px;
}
.container {
            column-count: 2;
            column-gap: 20px;
        }
        .column {
            padding: 10px;
        }
ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #333;
}

li {
  float: left;
}

li.n {
  float: none;
}
ul.ubd
 {
	 list-style-type: disc;
	  background-color: powderblue;
	  margin-left: 90px; 
	  padding: 1px;
	  overflow: visible;
	  float:none;
 }
ul.ubd2
 {
	 list-style-type: square;
	  background-color: powderblue;
	  margin-left: 90px; 
	  padding: 1px;
	  overflow: visible;
	  float:none;
 }
 
  ul.ubd3
 {
	 list-style-type: square;
	  background-color: powderblue;
	  margin-left: 90px; 
	  padding: 1px;
	  overflow: visible;
	  float:none;
 }
 
 
li a {
  display: block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

/* Change the link color to #111 (black) on hover */
li a:hover {
  background-color: #111;
}
.active {
  background-color: #04AA6D;
}
.imagecenter {
  display: block;
  margin-left: auto;
  margin-right: auto;  
}