Using the class list below, pick one person using random selection. Then move down four names on the class list and mark that person$$s name. Continue until $60$ names are marked, go back to the start of the list and wrap around as needed. For each marked name record the data value $($number of movies watched$).$

What method of sampling did you use? $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$