Senstivity Analysis

Q$3.$ You can retire at age $65$ and receive $$100,000$ per year or retire at $70$ and receive $$150,000$ per year. What is the difference $($in today's dollars$)$ between these two choices as you vary the annual rate of discount cash flows between $2$ percent and $10$ percent and vary age of death between $75$ and $85?(20$ points$)$