Asap giving 20 points for this and branliest answer what sentence demonstrates the most appropriate tone when writing to an adult?

all students are required to conduct an interview with a local businessperson, and you were the only person i could think to ask. can you make some time for me to stop by your office next week?
since you are a professional in the community, i have prepared five questions to ask during the interview. would you be able to give me fifteen minutes of your time?
whether you can give me five or fifteen minutes of time, i promise to be prepared and to discuss only what deals with the requirements of the class project.
i have a class project due, and i am required to speak with a businessperson in the community. i can meet you anytime, anywhere, and i promise i will be as brief as possible.