Exercise $17-16($Algo$)$ Determine and record pension expense and gains and losses; funding and retiree benefits $[$LO$17-6,17-7]$

Actuary and trustee reports indicate the following changes in the PBO and plan assets of Mahomes Industries during $2024$:

Required:

$1-$a$.$ Determine Mahomes's pension expense for $2024.$

$1-$b$,2.$ to $4.$ Prepare the appropriate journal entries to record the pension expense, to record any $2024$ gains and losses, to record the cash contribution to plan assets and to record retiree benefits.