body {
    color: Black;
    background: White;
    margin-right: 10%;
    margin-left: 10%;
    font-family: "Times New Roman", serif;
    text-align: justify
    }
h1 {
    text-align: center
    }
h2 {
    text-align: center
    }
h3 {
    text-align: center
    }
h4 {
    text-align: center
    }
p.chapterHeading {
    margin-right: 20%;
    margin-left: 20%;
    text-align: center
    }
.centered {
    text-align: center
    }
sup {
    font-size: 60%
    }