输入10个学生5门课的成绩，分别用函数求：1，每个学生的平均分；2，每门课的平均分3，找出最高分所对应的学生和课程；4，求出平均分方差。-Enter the results of 10 students in the course, function evaluation: 1, the average of each student　2, the average per course, to identify the highest branch of the corresponding students and courses　4, calculated the average points of variance.