Number of employees covered Years employed as of January 1, 2021 Attribution period Expected postretirement benefit obligation, Jan. 1 Expected postretirement benefit obligation, Dec. 31 Interest rate Funding 3 2 [each] 25 years $61,000 $64,050 5% none Required: 1. What is the accumulated postretirement benefit obligation at the beginning of 2021? 2. What is interest cost to be included in 2021 postretirement benefit expense? 3. What is service cost to be included in 2021 postretirement benefit expense? 4. Prepare the journal entry to record the postretirement benefit expense for 2021. Complete this question by entering your answers in the tabs below. Req 1 to 3 Req 4 What is the accumulated postretirement benefit obligation at the beginning of 2021? What is interest cost and service cost to be included in 2021 postretirement benefit expense? 1. Accumulated postretirement benefit obligation 2. Interest cost 3. Service cost