At the start of the night, a beer fridge has 7 bottles of Alamo Beer, 19 bottles of Buzz Beer, and 4 bottles of Duff Beer. Suppose three bottles are randomly selected, opened, and drank. Calculate the following probabilities. Round answers to three digits after the decimal if necessary. a. The first and third bottles are both Duff and the second bottle is not. [2 marks) b. One of each brand is selected. (3 marks) bi