Answer:
d. $30,000.
Step-by-step explanation:
Jack is entitled to 100% of his own contributions = $9,000 + $4,000 = $13,000
The following is the least generous vesting schedule
Least-generous graded vesting schedule
Years of service % vested
1 0%
2 20%
3 40%
4 60%
5 80%
6 100%
Since jack worked for 57 months, he is entitled to 100% of the employer's contributions = $12,000 + $5,000 = $17,000
Total account balance = $13,000 + $17,000 = $30,000