Take two vectors, and output the mean of them (bonus if you don't use the in-built mean function)
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.
Set the array elements whose value is 13 to 0
Doubling elements in a vector
Replace every 3rd element in a vector with 4
Times 3 problem
Matrix Max Finder
Find the sum of the largest two elements in a vector
Matrix Ax=B problem
Simple String Concatenation
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