1 The slice operation is used to create a new list that contains a subset of items from a source list. Implement the slice() function: def slice( theList, first, last ) which accepts a list and...

1 The slice operation is used to create a new list that contains a subset of items from a source list. Implement the slice() function:
def
slice( theList, first, last ) which accepts a list and creates a sublist of the values in theList. What is the worst case time for your implementation and what is the best case time?

2 Implement the remaining methods of the SparseMatrix class: transpose(), getitem , subtract(), and multiply().

3 Determine the worst case time-complexities for the SparseMatrix methods implemented in the previous question.