Answer:
d. 6.4%.
Step-by-step explanation:
Even though 70% of the benefits are allocated to 15 key employees (and also co-owners), non-key employees must receive a minimum benefit.
This minimum benefit = 2% x the number of years in service (for the purpose of the plan) = 2% x 4 = 8%. But this minimum benefit is reduced depending on the % of vesting which in this case = 4 years /5 years = 0.8.
total benefit = 8% x 0.8 = 6.4%