Kathy bicycles 8km/h faster than dennis. in my he same time it takes dennis to bicycle 36 km, kathy can bicycle 60 km. how fast does each bicyclist travel

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