6. The Radium Hot Springs plans to install a swimming pool. Construction of the lift is estimated to require an immediate outlay of $420 000. The life of the pool is estimated to be 20 years with a salvage value of $20 000. Cost of preparing the area is expected to be $30 000 for each of the first 2 years of operation. Net cash inflows from the pool are expected to be $49 000 for each of the first five years and $90 000 for each of the following 15 years. Find the rate of return (correct to the nearest tenth of a percent)