Scarlett just won a $$156,000,000$ lottery in Maine. Instead of receiving a lump sum, she found that she would receive $$6,500,000$ annually $($end of year$)$ for $24$ years. Scarlett is $68$ years old and wants her money now. She has been offered $$91,200,000$ to sell her ticket. What rate of return is the buyer expecting to make if Scarlett accepts the offer?