What is the price and duration of each bond?

Suppose that a pension fund has to make a payment of $1 million in 2 years time. It can hold a one year pure discount bond that will pay $1000 in I year, or a 3 year bond that will pay a coupon of $100 each year, will be redeemed for $1,000 at the end of the third year. The yield on each bond is 15%