I'm stuck on this one because I've never used swap before. I've tried a few different ways but keep getting an error that swap is not defined. Write a function swap that swaps the first and last elements of a list argument. Sample output with input: 'all,good,things,must,end,here' ['here', 'good', 'things', 'must', 'end', 'all'] values_list = input().split(',') # Program receives comma-separated values like 5,4,12,19 swap(values_list) print(values_list) Continue reading...