Write a script that creates a 2 x 2 square matrix of 1's. The script then uses a nested for loop to traverse the matrix and multiply the value of the matrix by the number of times the loop executed. The final result should be a matrix of [1, 2; 3, 4] or [(1 * 1), (1 * 2). Write a function that takes in a parameter called toCheck. The function returns a single value, isLetter, which is the result of the toCheck parameter being a letter. If the toCheck is a letter, isLetter is a 1. If the toCheck is not a letter, isLetter is a 0.