7. A certain strain of pea has a 75% chance of having red blossoms and a 25% chance of having white blossoms. The blossom color for different plants is independent. (a) What is the probability that given four of the plants, exactly three have red blossoms? (b) What is the mean number of plants with red blossoms for all samples of 80 plants? (c) What is the probability of getting at least 65 plants with red blossoms in a sample of 80 plants. Use the Normal approximation. 25'E