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).
Find the sum of all the numbers of the input vector
Determine whether a vector is monotonically increasing
07 - Common functions and indexing 6
07 - Common functions and indexing 3
06 - Matrix Equations 2
02 - Vector Variables 3
02 - Vector Variables 4
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