Part B: Rotate Write a function rotate(s,n) that has one string parameter s followed by a positive integer parameter n. It returns a rotated string such that the last n characters have been moved to the beginning. If the string is empty or a single character, the function should simply return the string unchanged. Assume that n is less than or equal to the length of s and that n is a positive intger. For example: rotate('abcdefgh',3) returns 'fghabcde' (Optional challenge: write the function to handle n larger than the length of s.)

Use Python