20 Years of Service Benefit Retirement Plan Assignment

Your company offers a defined benefit retirement plan, and stipulates that you must have 20 years of service in order to be fully vested in the plan, but allows for incremental vesting. You have been with the company for 15 years when you decide to leave the company for a job in another state.

A) At the appropriate retirement age, are you eligible for any pension pay out?
B) What percent of the total accrued benefit would you be eligible for?