1) Classify the following as a random, systematic, stratified, or cluster sampling. ( 2 pts. each ) a. A popular website is interested in conducting a survey of 400 visitors to the site in such a way that 200 of them will be under age 30, 150 will be aged 30-55, and 50 will be over 55. b. A college basketball team held a promotion at one of its games in which every twentieth person who entered the arena won a free basketball. C. A company has 1000 employees, of whom 800 are full-time and 200 are part-time. Twenty employees are randomly selected from each group and asked to complete a survey about their opinions regarding benefits. d. A pollster obtains a list of all the residential addresses in a certain town, and uses a computer random number generator to choose 150 of them. The pollster mails a survey to these 150 homes to determine television viewing habits. e. To check the accuracy of the census count in a certain city, the U.S. Census Bureau recounts everyone in selected census districts (roughly equivalent to a city block)