The chief executive officer (CEO) of a local tech company wants to conduct a survey to estimate the proportion of employees happy with the physical appearance of the company buildings and grounds. The committee is considering two methods of obtaining a sample of 600 employees from the 4,700 employees at the company. Part A: Because of financial constraints, the first method the CEO is considering is to keep the cost at a minimum. A large number of employees will attend the annual conference, and the first 600 employees who enter the conference center could be used as a sample. Identify the type of sampling method proposed and discuss why such a sampling method might be biased (5 points) Part B: Because stratification can often provide a more precise estimate than a simple random sample, the second method the CEO is considering consists of selecting a stratified random sample of 600 employees. The company has two campuses, with male and female employees at each campus. Under what circumstance(s) would stratification by campus provide a more precise estimate of the proportion of employees who are satisfied with the appearance of the company buildings and grounds than stratification by gender? (5 points) (10 points)