This time of year, it rains at some point in the day on about a quarter of the days. You wake up and look at
the sky: it's cloudy. You think that it's 4 times more likely to be cloudy in the morning if it's going to rain
than if it's not going to rain. Updating on the fact that it's cloudy, what are the new odds that it's going to rain
at some point in the day?