An auditor has found that SN of a client company's customers have been overcharged. For those who have been overcharged, the percentage overcharged is well described by the normal distribution with mean of 15 and a standard devation of 3. (a) Given that a customer is overcharged, what is the probability that the percent of customers who were overcharged was more than 10? Display 4 decimal places. (b) What is the 30th percentile of percent overcharged? (c) if 20 customers are randomly selected, what is the probability that more than 3 of them were overcharged?Display 4 decimal places

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