@media screen and (max-width: 640px) {
 img{
  max-width: 100%;
  height: auto;
  width /***/:auto;
 }

 .table5 {
   border-collapse: collapse;
   font-family: sans-serif;
   width: 300px;
 }
 .table5 th {
   background-color: #00ffff;
 }
 .table5 td {
   text-align: center;
 }
}