Can you help me with these? I am confused --

Let x denote the actual net weights (in pounds) of 100 randomly selected bags of fertilizer. Suppose that the weight of a randomly selected bag has a 1' \"2' ' ' ' 'x100 distribution with mean 60 lbs and variance 1 lbz. Let E be the sample mean weight (n = 100). (a) Describe the sampling distribution of i O The distribution is unknown with a mean of 60 lbs and variance of 1 lbz. O The distribution is unknown with unknown mean and variance. 0 The distribution is unknown with a mean of 60 lbs and variance of 0.01 Ibsz. O The distribution is approximately normal with a mean of 60 lbs and variance of 0.01 lsz. O The distribution is approximately normal with a mean of 60 lbs and variance of 1 Ibz. (b) What is the probability that the sample mean is between 59.85 lbs and 60.15 lbs? (Round your answer to four decimal places.) P(59.85 s E g 50.15) = (c) What is the probability that the sample mean is less than 60 lbs