Utilizing MATLAB solve the following

Example:the following function sorts the elements of a vector in ascending order function v gsort (v) pos 2; while posv (pos-1) % move to the next position pos pos1; else % swap the values foo -v(pos-1) (pos-1)v(pos) v(pos)foo; if pos > 2 % decrease position pos - pos-1; end end end 2. Write a function that calculates a random walk trajectory based on the iteratione, where e is a uniformly distributed random variable between-1 and 1. Plot the resulting trajectory 3. Change the sorting algorithm given above such that it sorts the elements in descending order Compare the speed of your function with the built-in MATLAB function sort