at the end, set all to font-size:75px

set img to  
float: center;
width: 1000px;
margin: 0px;
border-color: black;
border-width: 4px;
border-style: solid;
border-radius: 10px;

body {background-color: 
  lightgray;
 }

h2{ 
  text-align: center; 
  text-decoration: underline;
  font-size:75px
}

h4{
  text-align: center;
  font-size: 75px
}
li{
  text-align: center;
  font-size:75px
}  
p {
  color: black;
  text-align: center;
  font-size:75px
}
h1 {
  font-weight: bold; 
  text-align: center;
  font-size:75px
}
h3{
  text-align: center;
  text-decoration: underline;
  font-size:75px
}
img {
  float: center;
  width: 1000px;
  margin: 0px;
  border-color: black;
  border-width: 4px;
  border-style: solid;
  border-radius: 10px;
  
}