Problem #2 has a missing right bracket on y_correct.
The test suite has been fixed.
solution test 2 has mistake
y_correct = [-1 -1 -1 -2 -2 -2 -2 5 5 5 5 5 ;
there should be ] at the end
Replace multiples of 5 with NaN
find the roots of a quadratic equation
Volume of a box
Sum of the Multiplication of Vectors
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