II. Iterator & Iterable Interfaces: The methods of each interface. How each is implemented relative to the Data Structure. Relationship with for Each. III. Stacks: . Its main operations. Examples of its application. Postfix algorithms: Conversion Example: 2 + 14.5 Output: 2 145* + Evaluation Example: 2 14 5 * + Result: 72 II. Iterator & Iterable Interfaces: The methods of each interface. How each is implemented relative to the Data Structure. Relationship with for Each. III. Stacks: . Its main operations. Examples of its application. Postfix algorithms: Conversion Example: 2 + 14.5 Output: 2 145* + Evaluation Example: 2 14 5 * + Result: 72