Replace present refrigerators with similar refrigerators at a cost of $20 x 106. Option 2. Replace present refrigerators with lake-source cooling at a cost of $50 x 106. However, the lake-source cooling would save 1.5 x 106 $/year in electricity costs. Assume a 10-year straight-line depreciation for both options. Do you agree with the utilities engineers' conclusion that lake-source cooling is economically advantageous?