h1 {
    color: black;
    font-family: 'Times New Roman', Times, serif;
    border-style: solid;
}
h2 {
    font-family: 'Times New Roman', Times, serif;
    border-style: solid;
}
p {
    font-family: 'Times New Roman', Times, serif;
}
.red {
    color: red;
}
.black {
    color: black;
}
#optional {
    font-style: italic;
}
#link {
    border-style: dashed;
}
#png{
    border-style: solid;
    border-top-color: red;
    border-bottom-color: red;
}