Realice una pagina web en visual que permita almacenar los datos del promedio de tres calificaciones para un estudiante de una universidad
<!DOCTYPE html> <html> <head> <title></title> </head> <body> <div class="container" id="main"> <h1>Promedio de calificaciones</h1> <form action=""> <input type="text" name="name" placeholder="nombre"> <input type="number" name="grade1" placeholder="nota 1"> <input type="number" name="grade2" placeholder="nota 2"> <input type="number" name="grade3" placeholder="nota 3"> <input type="submit" name="comprobar" value="comprobar"> </form> <?php $name = $_GET['name']; $grade1 = $_GET['grade1']; $grade2 = $_GET['grade2']; $grade3 = $_GET['grade3']; $grade = ($grade1 + $grade2 + $grade3)/3; if ($grade