plz Help with formula to calculate bonus

Salary Years Worked Bonus 1000 5 1000 10 1000 20 1000 4 1000 15 1000 14 1000 19 1000 8 1000 17 A manager needs to distribute bonuses based on years worked. The manager need to enter employee names, salary and how many years worked. If the employee worked less than 10 years they get 2% of their salary. If the employee worked 10 or more years and less than 20 years, they get a 4% of their salary. If they worked 20 years or more they get a 5% of their salary. On problem 6B worksheet solution to provide the bonus for each employee