Additional test cases have been added.
The title and description/instruction should refer to finding and outputting "means" (plural), not "the mean" (singular). Also, it would have been good for the Test Suite to include both row and column vectors, appropriately paired.
Return the first and last characters of a character array
Given a matrix, swap the 2nd & 3rd columns
04 - Scalar Equations 1
Swap two numbers
Is My Wife Wrong?
Matrix Ax=B problem
Check if inputted variable is a string or a number
Sum two matrices
Automatic String Editing
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