A Web ad can be designed from seven different colors, fifteen font types, six font sizes, four images, and ten text phrases. A specific design is randomly generated by the Web server when you visit the site. Let A denote the event that the design color is red and let B denote the event that the font size is not the smallest one. Use the addition rules to calculate the following probabilities. a) P(A U B), b) P(A' U B')