An Obligation That He Will Pay 1 Million A Year For The Next 3 Years What Is The

Randy currently has an obligation that he will pay $1 million a year for the next 3 years, what is the duration of his obligation if the appropriate discount rate is 5%?

If Randy wants to immunize his obligation using a 1-year zero coupon bond and a perpetuity both yielding 6%. I rounded the durations to two decimal places to minimize rounding errors.

What is the weight he should invest in the zero?