On matlab please

Write a function, last_name, that accepts a character array representing a person's full name, and returns the person's last name. For purposes of this exercise, the name can be assumed to be in this format: . Last, First (e.g., 'Toney, James') A reasonable approach to this problem is as follows: Find the position of the comma using the find() function. Return the portion of the array from the first character to the one before the comma