Table: Courses +-------------+---------+ | 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. Write a solution to find all the classes that have at least five students . Return the result table in any order . The result format is in the following example. Example 1: Input: Courses table: +---------+----------+ | student | class | +---------+----------+ | A | Math | | B | English | | C | Math | | D | Biology | | E | Math | | F | Computer | | G | Math | | H | Math | | I | Math | +---------+----------+ Output: +---------+ | class | +---------+ | Math | +---------+ Explanation: - 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.