Walmart wants to know how many customers pay with their credit card. They decide to survey the first 20 people that come into the store. Identify the population and the sample space of this situation.

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years