Missiles and Inventory1. From a lot of 10 missiles, 4 are selected at random and fired. If the lot contains 3 defective missiles that will not fire, what is the probability that (a) 3 will fire?(b) At most 2 will not fire?(c) What is the expected number of missiles that will fire?2. In an inventory study it was determined that on average demands for a particular item at a warehouse were made four times per day. What is the probability that on a given day an item is requested(a) More than three times?(b) Not at all?Missiles and Inventory(c) If only 4 items are stocked, what is the probability of not having enough on a given day?(d) How many items would need to be stocked if the probability of not having enough on a given day is 5%?