The following data are available pertaining to Household Appliance Company's retiree health care plan for 2021 : 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. 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