Suppose that you have a two-dimensional array (list of lists) of numeric values where each row of the array has the same number of elements. For example, the following array has two rows of five elements:

t = [[8, 1, 6, 3, 5], [7, 0, 4, 9, 2]]

If you print the rows on top of one another then you get something that looks like a matrix:

8 1 6 3 5 7 0 4 9 2

In the module question3.py, write a function to_vector(t) that has a two-dimensional array t as a parameter and returns a list made up of elements of t taken column-wise; that is, the elements of the returned list are:

• the elements of first column of t, followed by
• the elements of second column of t, followed by
• the elements of third column of t, and so on

For the array shown above the function should return the list:

[8, 7, 1, 0, 6, 4, 3, 9, 5, 2]

If t is an empty array then the function should return the empty list.