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 integer. for example: rotate('abcdefgh',3) returns efgabcde'

Roger ginde is developing a program in supply chain management certification for managers. ginde has listed a number of activities that must be completed before a training program of this nature could be conducted. the activities, immediate predecessors, and times appear in the accompanying table: activity immediate predecessor(s) time (days) a -− 44b -− 55 c -− 11 d b 1010 e a, d 55 f c 55 g e, f 1010 calculate the slack time. show the details.