$ $in$ millions$2023=$$$1,550.$

$b.$ Prior service cost from plan amendment $on$ January $2,2024=$$$450(straight-$line amortization for $10-$year average

remaining service period$).$

$c.$ Service cost for $2024=$$$530.$

$d.$ Service cost for $2025=$$$580.$

$e.$ Discount rate used $by$ actuary $on$ projected benefit obligation for $2024$ and $2025=10\%.$

$f.$ Payments $to$ retirees $in2024=$$$390.$

$g.$ Payments $to$ retirees $in2025=$$$460.$

$h.No$ changes $in$ actuarial assumptions $or$ estimates.

$i.$ Net gain$-$AOCI $on$ January $1,2024=$$$235.$

$j.$ Net gains and losses are amortized for $10$ years $in2024$ and $2025.$

Information Provided $by$ Pension Fund Trustee:

$a.$ Plan asset balance $at$ fair value $on$ January $1,2024=$$$1,200.$

$b.2024$ contributions $=$ $$550.$

$c.2025$ contributions $=$$$600.$

$d.$ Expected long$-$term rate $of$ return $on$ plan assets $=12\%.$

$e.2024$ actual return $on$ plan assets $=$$$100.$

$f.2025$ actual return $on$ plan assets $=$$$150.$

Required:

Calculate pension expense for $2024$ and $2025.$

Prepare the journal entries for $2024$ and $2025to$ record pension expense.

Prepare the journal entries for $2024$ and $2025to$ record any gains and losses and new prior service cost.

Prepare the journal entries for $2024$ and $2025to$ record $(a)$ the cash contribution $to$ plan assets and $(b)$ the benefit

payments $to$ retirees.