Eprojected benefit obligation was $80 million at the beginning of the year. service cost for the year was $10 million. at the end of the year, pension benefits paid by the trustee were $6 million and there were no pension-related other comprehensive income accounts requiring amortization. the actuary’s discount rate was 5%. the actual return on plan assets was $5 million although it was expected to be only $4 million. what was the pension expense for the year?