In NumPy, to change a 1D array of 12 elements into a 3×4 2D…
In NumPy, to change a 1D array of 12 elements into a 3×4 2D array, use the ((3, 4)) method. To calculate the sum of all elements in array arr, use np.(arr) or arr.sum().
In NumPy, to change a 1D array of 12 elements into a 3×4 2D…