Eclipse Corp. is considering taking over a contaminated building site on a former mining site. In exchange for $$10,000,000$ from the mining company now, Eclipse will invest $$8,000,000$ per year for the following $3$ years to clean up the site. Once the site is clean at the end of year $3,$ it will receive a further $$15,000,000$ from the mining company. Over the following $2$ years, Eclipse will invest $$5,000,000$ per year to construct a race$-$track on the site. The new track will last forever and net $$1,000,000$ per year for Eclipse from gambling revenues starting at the end of year $6.$ If Eclipse's MARR is $10\%,$ what is the exact ERR for this project? Should Eclipse proceed with the project?