7. [-/3 Points] DETAILS 0/20 Submissions Used Suppose x has a distribution with # = 54 and o = 8. LO USE SALT (a) If random samples of size n = 16 are selected, can we say anything about the x distribution of sample means? Yes, the x distribution is normal with mean # - = 54 and o - = 2. Yes, the x distribution is normal with mean # ~ = 54 and o - = 0.5. Yes, the x distribution is normal with mean # * = 54 and o x = 8. O No, the sample size is too small. (b) If the original x distribution is normal, can we say anything about the x distribution of random samples of size 16? Yes, the x distribution is normal with mean # - = 54 and o - = 2. Yes, the x distribution is normal with mean # - = 54 and o - = 0.5. Yes, the x distribution is normal with mean # * = 54 and 6 - = 8. No, the sample size is too small. Find P(50 s x s 55). (Round your answer to four decimal places.)