body {
  font-family: arial;
  font-size: large;
  background-color: silver;
}
.titol1{
  font-size: x-large;
  font-weight: bold;
  text-align: center;
  text-decoration: underline;
}
.titol2{
  font-size: large;
  font-weight: bold;
  text-align: left;
  text-decoration: underline;
}
.paragraf1{  
  text-align: left;  
}
.titol3{
  font-weight: bold;
  text-decoration: underline;
}
.titol4{
  text-decoration: underline;
}