Basic Function Creation: Write a MATLAB function add numbers that takes two numbers, num$1$ and num$2,$ as input arguments and returns their sum. The function should have the following structure: function sum $=$ add$\_$numbers $($num$1,$ num$2).$

Function with Multiple Outputs: Create a function stats$\_$calculator that takes an array of numbers, data, and returns the mean, median, and standard deviation of the array. The function should be structured to return three values.