将DS段中3000H～301FH中存有一些学生的成绩，其中有些学生成绩低于60分，请将这些低于60分的学生的个数统计出来，并将他们的成绩加5分。加好成绩后，请计算一下学生的平均分。-DS segment 3000H ~ 301FH there are some of the results of the students, some students score less than 60 points, leave these students less than 60 the number of statistics, and their achievements, add 5 points. Plus good results, calculate the average of the students.