A company installs and services pumps made by three different manufacturers: x, , . 35% of pumps are made by x, 45% are made by , and 20% are made by . Of pumps made by x, 4% require minor repairs within a year. Of pumps made by , 2% require minor repairs within a year, and of those made by , 3%. If a pump requires a minor repair within a year, what is the probability it was made by ?