a {text-decoration:none;color: black;border-radius: 10px;border: 5px;border-style: solid;height:20px;width:100px;margin-bottom: 10px;text-align: center;}
body {background-color: rgb(156, 200, 218);}
h1 {text-align: center;}
.b {border-radius: 10px;border: 5px;border-style: solid;float: right;height:700px;width:80%;}
.c {display: flex;flex-direction: column;margin-left: 150px;}
hr {margin-bottom: 50px;background-color: rgb(108, 140, 153);height: 20px;}
.d {text-decoration:none;color: black;border-radius: 10px;border: 3px;border-style: solid;height:20px;width:100px;margin-bottom: 10px;text-align: center;background-color: rgb(108, 140, 153)}
.e {text-decoration:none;color: black;border-radius: 10px;border: 3px;border-style: solid;text-align: center;background-color: rgb(108, 140, 153)}
.f {width: 100%;text-decoration:none;color: black;border-radius: 10px;border: 3px;border-style: solid;text-align: center;background-color: rgb(156, 200, 218);}
table {border-color: black;}
td {background-color:rgb(154, 207, 228) ;}
.margin1 {margin-left: 20px;}