Can someone help me solve this, it'll be a great help! Thank you so much!

Problem B The size of two large batches A and B of an electrical component are in the ratio of 2:3. The resistance of the items in each batch are normally distributed. For batch A, the distribution has a mean of 30 ohms and a standard deviation of 2.5 ohms and for batch B, a mean of 32 ohms and a standard deviation of 2 ohms. When the two batches are combined and mixed, the combined batch therefore has a mean of =31.2 ohms and a standard deviation o=2.42 ohms. Suppose that any item of which resistance is more than 20 above or below u is regarded as effective. Find the proportion of defective items in the combined batch. * Your answer A random sample of three items is taken from the combined batch. What is the probability that this sample contains exactly one defective item? * Your answer Find the proportion of defective items in batch A and the proportion of defective items in batch B. * Your answer An item is randomly drawn from the combined batch and is found to be defective. What is the probability that this item originally belonged to batch B?* Your