Make fMat be a 5x3 matrix of random integers with values from -3 to 3
(Hint: use randi)
Test for randomness could be tightened (cf. Solution 1490988).
Which values occur exactly three times?
Back to basics 11 - Max Integer
Remove the two elements next to NaN value
02 - Vector Variables 2
01 - Scalar variables
03 - Matrix Variables 2
07 - Common functions and indexing 3
07 - Common functions and indexing 5
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