Implement a main() for the test portions of the program. Use the following format for implementing the function main(). if name "main" main( In Python P6.4 Write list functions that carry out the following tasks for a list of integers. For each function, provide a test program. a. Swap the first and last elements in the list b. Shift all elements by one to the right and move the last element into the first position. For example, 149 16 25 would be transformed into 25 149 16 c. Replace all even elements with d. Replace each element except the first and last by the larger of its two neighbors e. Remove the middle element if the list length is odd, or the middle two elements if the length is even. f. Move all even elements to the front, otherwise preserving the order of the elements