Question 4 (13 marks) Pure breed peas were crossed to produce smooth and wrinkled peas. The first-generation peas were all smooth. In the second generation, 5474 smooth and 1850 wrinkled peas were obtained. Do the data agree with the conclusion of 75% dominant trait (here "smooth") occurrence in the second generation? a) Find a point estimate for a proportion of smooth peas. b) Use the plus four method to construct a 95% confidence interval for a proportion of smooth peas using the standard normal distribution. State your conclusion. c) Perform a test using a Chi-square distribution at a significance level of 0.05