For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding, Santa Fe black-on-white is a type of pottery commonly found at archaeological excavations at a certain monument. At one excavation site a sample of 570 potsherds was found, of which 357 were identified as Santa Fe black-on-white. LA USE SALT (a) Let p represent the proportion of Santa Fe black-on-white potsherds at the excavation site. Find a point estimate for p. (Round your answer to four decimal places.) (b) Find a 95% confidence interval for p. (Round your answers to three decimal places.) lower limit upper limit