CBA employees are eligible with benefits that provide 15 years reimbursement for health care services of $40,000 annually, beginning one year from the date of retirement. The plan is unfunded. Old Ma was hired at the beginning of 2000 and is expected to retire at the end of 2023 . The discount rate is 4%. The PV of an ordinary annuity of $1 where n=15 and i=4% is 11.11839. The PV of $1 where n=2 and i=4% is 0.92456. With respect to Ma, what is the service cost in CBA's 2021 postretirement benefit expense? a. $7,089 b. $34,266 c. $52,772 d. $6,365 e. $17,133