From the following mutually exclusive alternatives, select the best one by rate of return analysis method, if the Average annual rate of reduction is 10% per year and the projects have a useful life of 15 years. make an analysis of individual investment and extraordinary investment in the following table, first row is the initial invertion 

second row :annual maintenance cost

third row: Annual income

1 2. 3 4 5 6 7 250,000 190,000 240,000 265,000 255,000 240.000 265,000 15,000 16,000 14.000 17,000 18,000 13,000 12.000 52,000 49.000 68,000 50,000 81,000 77,000 45,000