You purchase a piece of equipment for exist20,000 for a project that lasts four years. At the end of four years, the salvage value is exist5,000. There is no benefit the first years however, during the three following years, an annual benefit occurs of exist4,000 each year. If the MARR (Minimum Attractive Rate of Return/Nominal Interest Rate) is 6%, choose the right equation to determine the EUAW (Equivalent Uniform Annual Worth).