A farmer wants to test the effectiveness of a pest control method in allowing strawberry blooms to yield marketable strawberries. In a pilot study of a random sample of 100 blooms, 77 yield marketable strawberries. Use this data as a guess for the proportion of blooms that yield marketable strawberries. What is the minimum sample size that should be used for a future study to ensure that the margin of error is less than 5 percent points, with 95% confidence