.az-1 {
    background-image: url("https://images.hanlonsonline.co.uk/Ealing BS5/images/apprenticeship-zone/Young boy working in a kitchen.jpg");
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    padding: 0px;
    min-height: 0px;
    min-height: 400px;
}

.az-2 {
    background-image: url("https://images.hanlonsonline.co.uk/Ealing BS5/images/apprenticeship-zone/man-newspaper.jpg");
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    padding: 0px;
    min-height: 0px;
    min-height: 400px;
}

.az-3 {
    background-image: url("https://images.hanlonsonline.co.uk/Ealing BS5/images/apprenticeship-zone/A lady and a man working in contruction.jpg");
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    padding: 0px;
    min-height: 0px;
    min-height: 400px;
}

@media only screen and (max-width: 768px) {
    .az-2 {
        margin-top: 10px;
    }
}