4) Define a vector with values ranging from 1 to 12. Now define a 4x3 matrix to store elements from the vector you have defined. That is, first 3 elements of the vector should be row 1 of the matrix, next 3 should be row 2, and so on.

5) Consider the 4x3 matrix from question 4. Add 100 to all values that are greater than equal to 3 and less than equal to 8.

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