Question: What does the expression `mtrx * mtrx` do ?

  1. it transpose **mtrx**
  2. it premultiplies the current **netwmat** row by the **newmat** column.
  3. it returns the results of a matrix multiplication
  4. It squares each cell in **mtrx**

Answer: The correct answer of the above question is Option D:It squares each cell in **mtrx**