4) A manufacturer of automobiles conducted a market survey. Eighty percent of the customers want better fuel efficiency, while 55% want a vehicle navigation system and 45% percent want both features. a) The probability that a person wants better fuel efficiency and also a vehicle navigation system is: b) The probability that a person wants better fuel efficiency but not a vehicle navigation system is c) The probability that a person wants a vehicle navigation system but not better-fuel efficiency: d) The probability that a person wants neither better fuel efficiency nor a vehicle navigation system is: e) The probability that a person wants either better fuel efficiency or a vehicle navigation system is: a f) The probability that a person does not want a vehicle navigation system is: g) The probability that a person wants a better fuel efficiency given that he wants a vehicle navigation system is approximately: a h) The probability that a person wants a vehicle navigation system given that he wants a better fuel efficiency is approximately