2. Dill Computer has Defined Benefit Plan. Dill Computer has a 3 to 7 year Graduated vesting schedule. Billy and Danielle both qualify and participate in the plan. Billy has been working for the firm for 2 years and Danielle has been working for 5 years. a. To what levels are both Billy and Danielle vested in employer contributions? b. Assuming that the plan is considered top heavy, to what levels are both Bill and Danielle vested in employer contributions based upon both alternative schedules