Using explicit iteration is not the most efficient way of solving this problem, but if you do choose to iterate I would suggest using "linear indexing", per https://au.mathworks.com/help/matlab/math/matrix-indexing.html?s_tid=doc_srchtitle#f1-85511
Is it a number?
Duplicate a character
Length of the hypotenuse
Sum the 'edge' values of a matrix
What's size of TV?
Probability of red tulips
Probability of red tulips (at both ends of a row)
Delete the column with all 0 !
Average of even-numbered columns
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