Your financial planner offers you two different investment plans. Plan X is a $20,000 annual perpetuity. Plan

Your financial planner offers you two different investment plans. Plan X is a $20,000 annual perpetuity. Plan Y is an annuity lasting 15 years and an annual payment, $35,000. Both plans will make their first payment one year from today.
 
At what discount rate would you be indifferent between these two plans?
Y is an annuity lasting 15 years and an annual payment, $35,000. Both plans will make their first payment one year from today.
 
At what discount rate would you be indifferent between these two plans?