plz solve all of it correctly

The aim of this assignment is for you to practice analyzing the problem space and make decision based on your analysis. Assume that you have been employed to design an interactive product such as a smartphone app, computer software, or some other type of technology. This product is for athletes to be used while training. Answer the following questions: a. What type of interfaces would you use for this system (it can be a single or combined interfaces)? why? b. What is the steps that you followed to make choose this type of interfaces? c. With an example, explain how such system (using your proposed interface) can be beneficial for the targeted users (athletes). d. With an example, what limitations can the targeted users face when using your proposed interface for this interactive system