Need help with this question A-D

Medical billing errors and fraud are on the rise. According to one study, 7 out of 10 times, the medical bills received by patients are not right. Complete parts (a) through (d) below. a. If a sample of 11 medical bills is selected, what is the probability that exactly 0 bills will contain errors? The probability is (Type an integer or decimal rounded to four decimal places as needed.) b. If a sample of 11 medical bills is selected, what is the probability that exactly 4 bills will contain errors? The probability is (Type an integer or decimal rounded to four decimal places as needed.) c. If a sample of 11 medical bills is selected, what is the probability that more than 6 bills will contain errors? The probability is (Type an integer or decimal rounded to four decimal places as needed.) d. What are the mean and standard deviation of the probability distribution? The mean is and the standard deviation is (Type integers or decimals rounded to four decimal places as needed.)