As with all other questions, be confident and enthusiastic when you answer this. Don’t try to say you are the best qualified person, because you don't know the qualification of other applicants. Instead emphasize several reasons why you should be hired. You can say something like this: "I’ve got extensive experience in (name the appropriate field) and I have the specific skills you are looking for. I am a fast learner who adapts quickly to change and will hit the ground running. I am dedicated and enthusiastic about helping Safaricom meet its goals, and will provide top quality results with minimal supervision. I am an outstanding performer who takes pride in my work. You won't have any regrets when you hire me."