5. Determine the present worth in year 0 (PT) of the cost through year 9 at an interest rate of 10% per year PT=? i = 10% 0 1 2 3 4 5 6 7 8 9 Actual year 3 4 5 6 Gradient years $50 $50 $50 $50 $55 $60 G=5 $65 $70 $75