Exercise 4 [Displaying a Matrix] Write a function printMatrix() that takes a list of lists of strings as input, checks if it is an integer matrix (see last problem), and then prints it out. Print out an error message or just an empty matrix (i.e., I) if the parameter is not an integer matrix. For example: >>>printMatrix([["0","1","2"],["3","4","5",1,["6","7","8"]]) 10121 | 34 51 | 6 7 8 >>> printMatrix([["0"], ("1", "2"]]) [] Can you make all the numbers in the matrix line up nicely (aligned to the right)? When using f- strings, you can have nested braces {} to embed variables in the formatting details. For example, consider the following >>>width = 10 >>>word = 'cat' >>>f'the word is {word:>{width}}.' 'the word is cat.' The outer {}'s hold the first evaluation (the string word) and the inner {}'s hold another evaluation to specify the minimum length of the created string