YOU HAVE TO SOLVE FOR THE IRR WITHOUT USING THE MARR AT ALL AND THEN COMPARE IT TO THE MARR

An advertising campaign will cost $258,000 for planning and $60,000 in each of the next six years. It is expected to increase revenues permanently by $60,000 per year. Additional revenues will be gained in the pattern of an arithmetic gradient with $24,000 in the first year, declining by $6,000 per year to zero in the fifth year. What is the IRR of this investment? If the company's MARR is 8 percent, is this a good investment? The IRR is percent, which is the MARR, so the advertising campaign a good investment. (Round to one decimal place as needed.)