.Main{
    display: grid;
    gap: 10px;
    grid-template-columns: 1fr 2fr;
    grid-template-rows: 1fr 1fr 1fr;
}

.Group{
    background: aquamarine;
    border: 1px solid dodgerblue;
    padding: 10px;

    display: grid;
    gap: 10px;
    grid-template-columns: 1fr 1fr;
}

.GroupFour{
    grid-column-start: 1;
    grid-column-end: 3;
}

.Classmate{
    background-color: dodgerblue;
    border: 1px solid blue;
    padding: 10px;
    color: blue;
}

#Mark{
    grid-column-start: 2;
    grid-column-end: 3;
    grid-row-start: 1;
    grid-row-end: 3;

    display: flex;
    align-items: center;
    justify-content: center;
}