<p>Table: <code>Courses</code></p> <pre> +-------------+---------+ | Column Name | Type | +-------------+---------+ | student | varchar | | class | varchar | +-------------+---------+ (student, class) is the primary key (combination of columns with unique values) for this table. Each row of this table indicates the name of a student and the class in which they are enrolled. </pre> <p> </p> <p>Write a solution to find all the classes that have <strong>at least five students</strong>.</p> <p>Return the result table in <strong>any order</strong>.</p> <p>The result format is in the following example.</p> <p> </p> <p><strong class="example">Example 1:</strong></p> <pre> <strong>Input:</strong> Courses table: +---------+----------+ | student | class | +---------+----------+ | A | Math | | B | English | | C | Math | | D | Biology | | E | Math | | F | Computer | | G | Math | | H | Math | | I | Math | +---------+----------+ <strong>Output:</strong> +---------+ | class | +---------+ | Math | +---------+ <strong>Explanation:</strong> - Math has 6 students, so we include it. - English has 1 student, so we do not include it. - Biology has 1 student, so we do not include it. - Computer has 1 student, so we do not include it. </pre>