MATLAB ONLY, Please leave comments on everything, Thanks!

Write a function that takes as a parameter a positive integer and returns a list (array or vector in MATLAB/C++) of the prime factors of the given integer. For example, if the parameter is 20. you should return 2 2 5. Write a function that takes as a parameter a list (array or vector in MATLAB/C++) of 2 or more positive integers. Return the GCD of all elements in the list. For example, the GCD of 10 20 30 is 10