.main {
    width: 900px;
    margin: 0 auto;
    padding: 50px 40px;
}

.main h1 {
    text-align: center;
}

.header {
    font-size: 13pt;
    text-align: center;
}

.part-a {
    display: grid;
    grid-template-columns: repeat(5, 20%);
}

.part-b {
    display: grid;
    grid-template-columns: repeat(4, 25%);
    grid-template-rows: repeat(3, 330px);
}

.part-c {
    display: grid;
    grid-template-columns: repeat(4, 25%);
    grid-template-rows: 280px;
}

.part-d {
    display: grid;
    grid-template-columns: repeat(3, 33%);
    grid-template-rows: repeat(2, 240px);
}

.answer {
    display: grid;
    grid-template-columns: repeat(8, 12.5%);
}