Solve the following rate of return problems. a. An investment of $1,700 today returns $64,000 in 50 years. What is the internal rate of return on this investment? b. An investment costs $850,000 today and promises a single payment of $12.9 million in 22 years. What is the promised rate of return, IRR, on this investment? c. What return do you earn if you pay $24,410 for a stream of $4,000 payments lasting 10 years? Note: Round your answers to 2 decimal places. a. IRR b. IRR c. IRR 7.53 % % %