.slider-list-3 {
  padding-bottom: 40px;
}

.slider-list-6 {
  padding-bottom: 40px;
}

.slider-list-9 {
  padding-bottom: 40px;
}

.slider-item {
  width:300px;
  margin-right:10px;
  margin-left:10px;
}

.grades-item {
  height: 450px;
}

.hub-item {
  height: 420px;
}

.news-item {
  height: 490px;
}

.app-item {
  height: 350px;
}

.people-item {
  height: 650px;
}

.slider-item img {
  margin:auto;
}