answer all parts

A certain building has 2 elevators, a North elevator and a South elevator. Because of constructionI on any given day, the North elevator has probability 0.75 of being in operation, while the South elevator has probability 0.5 of being in operation. Suppose that the operation of each elevator is independent ot the other. If it was possible to get to the second floor today (meaning that at least one of the elevators was in operation), what is the probability that the North elevator was in operation today? {Please enter your answer as a decimal, correct to three places} Answer: Check