i have complete question A. i just need some help with B and C . please show all calculation

U 5100 par, 6% prefer Wount of dividende 1166 Chapter 20 Accounting for Pensions and Postretirement Benefits EX0-13 (L01,2,4) (Computation of Actual Return. Gains and Losses, Corridor Test, and Pension Expense) Erickson Com- pany sponsors a defined benefit pension plan. The corporation's actuary provides the following information about the plan. January 1, December 31, 2017 2017 Vested benefit obligation $1,500 $1,900 Accumulated benefit obligation 1,900 2,730 Projected benefit obligation 2,500 3,300 Plan assets (fair value) 1,700 2,620 Settlement rate and expected rate of return 10% Pension asset/liability 800 Service cost for the year 2017 400 Contributions (funding in 2017) 700 Benefits paid in 2017 200 Instructions (a) Compute the actual return on the plan assets in 2017. (b) Compute the amount of the other comprehensive income (G/L) as of December 31, 2017. (Assume the January 1, 2017, balance was zero.) (c) Compute the amount of net gain or loss amortization for 2017 (corridor approach). (d) Compute pension expense for 2017