A phone company surveys a sample of current customers to determine if they use their phones most often to text or use the Internet. They sort the data by payment plans, as shown below. Plan A: 27 text, 21 Internet Plan B: 13 text, 10 Internet Answer the questions to determine a conditional probability. How many customers are on payment plan B? How many of the customers on plan B text? What is the probability that a randomly selected customer who is on plan B uses the phone most often to text? Give the answer in fraction form.