Market research team members design a study aimed at estimating the proportion of customers who will accept the service agreement changes.

1. At the confidence level (= C = 0.90), determine the SMALLEST sample size needed for the margin of error no higher than B = 3.5%

2. At the confidence level (= C = 0.95), determine the SMALLEST sample size needed for the margin of error no higher than B = 4.5%

3. What will be the largest margin of error for a 95% interval based on n = 100 records?