For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding. In a random sample of 68 professional actors, it was found that 43 were extroverts. USE SALT (a) Let p represent the proportion of all actors who are extroverts. Find a point estimate for p. (Round your answer to four decimal places.) X (b) Find a 95% confidence interval for p. (Round your answers to two decimal places.) lower limit upper limit