The Worren Group's pension cost is $67 million. This amount includes a $70 million service cost, a $50 million interest cost, a $55 million reduction for the expected return on plon assets, and a $2 million amortization of a prior service cost Determine the components of pension cost that affects the net pension ability. (You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer. Any boxes left with a question mark will be automatically graded as incorrect.) Service cost Amortization of prior service cost Interest cost Expected return on planets