Matlab Script please

"In a Surfing Competition, each judge gives a score in the range of 1 to 10. The highest and lowest scores are canceled, and the rest are averaged. The average is the score of the performance. Write a program that reads a vector with judges scores and outputs the average. Note that you need to determine the highest and lowest scores before excluding them in the computation." The scores are contained in the surf _scores.mat file, which is on the course You are not allowed to use the built-in max, min and average functions from MATLAB