What is the solution to this equation?

Which of the following answers is 5/25 simplified? 1/5 5/5 2/5 1/25

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u

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