Suppоse yоu studied аll night fоr аn exаm and are afraid you will sleep through your alarm, so you text 3 friends asking them to call you around 10:00am to make sure you're awake. Suppose the probability that Friend 1 will call is 0.30, the probability that Friend 2 will call is 0.50, and the probability that Friend 3 will call is 0.75. Further suppose that these are independent events. What is the probability that none of your friends call you? Round your answer to 3 decimal places.