show all matlab codes used and pic of matlab command window. myvec = [5,7,7,11,3,5,9,1,5,7]

Write a function with header (tm) = myTruncMean (vec), which calculates the truncated mean of the values in vec, that is, the mean of the values not including the minimum and maximum values. If there are several values equal to the minimum or the maximum, then only one such value should be excluded. Your function can use only the built-in Matlab functions mean (or sum) and length and not more than one for-loop. Use your function to calculate the truncated mean of vec = [4:-1:1 1:2:7] and vec myvec. (Challenge: Same as above, but without using mean or sum.)