Xiao Ming has participated in six math tests. These six tests have a total average score. The average score of the last four tests is 3 points more than the total average score. The average score of the first, second and sixth tests is 3.6 points less than the overall average. May I ask: Is the average score of the first five tests higher or lower than the total average score? How much difference?
小明参加了六次数学测验，这六次测验有一个总平均分，后四次测验的平均分比总平均分多3分，第一次、第二次、第六次这三次测验的平均分要比总平均分少3.6分．请问：前五次测验的平均分与总平均分相比，高还是低？差多少分？
<result>0.24</result>