A successful music app tracked the number of song downloads each day for a months for 4 music artists, represented by The lines L, J,M, and D over the course of a month. Which line represents an artist whose download remained constant over the month?

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