/*lab2no2*/
.yellow-bg{
    text-decoration: underline;
    background-color: yellow;
}
.gray-bg{
    background-color: gray;
}
#year{
    font-weight: bold;
    font-style: italic;
    color: rgb(255, 0, 0);
}

/*lab2no3*/
.outer-box {
    display: inline-block;
    padding: 5px;
    border: 1px solid black;
}

table {
    border-collapse: collapse;
    margin: 0;
}

td {
    border: 1px solid black;
    width: 40px;
    height: 40px;
    text-align: center;
    vertical-align: middle;
    font-weight: bold;
    font-family: Arial, sans-serif;
}

tr:hover td {
    background-color: cyan;
}