A local photocopy shop has three black-and-white copiers and two color copiers. Based on historical data, the chance that each black-and-white copier will be down for repairs is 0.10. The color copiers are more problematic and are down 20% of the time each. c) What is the probability that at least one black-and-white copier will be up? P(At least one black-and-white up)=__________________