PLEASE ANSWER QUESTION #4 only

lilt paradigms seem (s) the most ll seernnS) the least natural? 2. Consider the trade-offs that we looked at. a. Can you think of any additional trade-offs? b. Compare and contrast the strengths and weaknesses of each of the para- digms that we looked at in terms of these trade-offs. 3. Consider the paradigms that we looked at. For each, describe an application for which you think the paradigm is appropriate. Explain. 4. Many of the paradigms that we looked at involve middleware, a software mod- ule that serves as an intermediary among the participants of an application. a. Consider the publish/subscribe message system model. How does the mid dleware in the paradigm allow publish/subscribe? b. How might a middleware program allow cross-platform support? c. How might a middleware program provide asynchronous interprocess communication? d. Which of the paradigms involves middleware? Explain. 5. Suppose you are building a software system for an organization to track l online. An expense records. Using the system, each employee may submit an expense request online, and subsequently receive an approval or denla em Wi ployee may also submit a record for an expense that has been incurred. thout going into specifics, choose a paradigm for the system, justify your he hoW YOIU WOuld apply the paradigm to the application