I create a queue and then perform the following operations: Insert 99 Insert 157 Insert 76 Remove the front element Insert 293 Insert 6 What is on the front of the queue? O 293 076 O 157 99

from PlaneQueue import PlaneQueue from PlaneNode import PlaneNode   if __name__ == "__main__":     plane_queue = PlaneQueue()          # TODO: Read in arriving flight codes and whether a flight has landed.      # Print the queue after every push() or pop() operation. If the user     # entered "landed", print which flight has landed. Continue until -1      # is read.

in pythonList patients_queue contains three patient names read from input. Complete the for loop using the enumerate() function to output each patient's position in line followed by the patient's name.

=zyBooks ▾ learn.zybooks.com Given numQueue: 50, 43 What are the queue's contents after the following operations? Enqueue(numQueue, 89) Dequeue(numQueue) Dequeue(numQueue) 11 Ex: 1,2,3 After the above operations, what does GetLength (numQueue) return? Ex: 8 • 3 4 >

Implement RemoveLastCommand's execute() method to remove source_list's last element. Step 4: Implement GroceryList's execute_undo() method Implement GroceryList's execute_undo() method to do the following: Pop an UndoCommand off the undo stack • Execute the popped undo command File main.py has code that reads in a list of commands, one per line, that allow for basic testing of basic operations. So after implementing execute_undo(), run your program with the following input: add bananas add grapes add strawberries print undo print undo print quit Verify that the corresponding output is: 0. bananas 1. grapes 2. strawberries 0. bananas 1. grapes 0. bananas The program's output does not affect grading, so additional test cases can be added, if desired. Submitting code written so far to obtain partial credit is recommended before proceeding to the next step. Step 5: Implement the SwapCommand class and GroceryList's swap_with_undo() method