Answer the following questions Section A. [10 Marks a) Mr. Abdullah and Mr. Tariq knows to operate the computer system well. Mr. Abdullah is using the computer without a mouse while Mr. Tariq is using the computer without a keyboard. What are the interfaces that supports these people to interact with the computer? Explain your answer with one example. (3 Marks) b) Mr. Mohammed knows English and Mr. Imad knows Arabic very well. They want to communicate each other for business purposes. Mr. Mubarak is helping Mr. Mohammed to communicate with Mr. Imad and vice versa. Based on this scenario, list any 2 types of operating system used for communication. Explain your answer. (3 Marks) c) There are three people who registered themselves in Badar hospital to get a treatment. They are in queue in the waiting hall. Doctor will call the patient based on their token number for treatment. Write any 2 types of schedulers applicable in the above scenario. Justify your answer. (4 Marks)