Grafting, the uniting of the stem of one plant with the stem or root of another, is widely used commercially to grow the stern of one variety that produces ne fruit on the root system of another variety with a hardy root system. For example, most sweet oranges grow on trees grafted to the root of a sour orange variety. Suppose each graft fails independently with probability 0.30. Five grafts are scheduled to be performed next week. Let X denote the number of grafts that will fail next week. A. What is the written form of the distribution of the random variable X including its parameters? B. Write the formula for the PMF of X. C. Give the expected value and variance of X. D. Suppose that the cost of each failed graft is nine dollars. Find a The probability that the cost from failed grafts will exceed twenty dollars. a The expected value and the variance of the cost from failed grafts