25. LO.2 Blonde Corporation has a calendar year retirement plan covering its participants.

William, age 21, is hired on January 31, 2012, and he meets the service requirement over the next 12 months (completes at least 1,000 hours by January 31, 2013).

a. If the company adopts the most restrictive eligibility rules, William must be included in the plan by no later than what date?

b. If the company adopts the two-year participation rule, William must be included in the plan by no later than what date?