a2 (8 Points) for three The First cost (S) 25 00038 5 000 ge value (s)000 8000 40 000 10 00015 000 10 15 000 cost (S/m Expected Useful Life [Y) 6 12 (a) If the MARR is 15% per year, (b) If all machines has very long Useful Life, select the best alternative. select the best alternative