Question 4 Demonstrate the assessment of Present Worth (PW) with i= 10% for the given options. Show all conversions made without any shortcut. The labor cost is effective for repair and upgrade only. The labor cost is only effective once the warranty period is over. Approach, assess and solve the issue as an engineer. The cash flow diagram is not warranted. Provide commentary on the assessment made. Economic Merits ASSET A B Annual income Fa Fb Annual maintenance Ha Hb Repair (on 2nd and 8th year) Ga Gb Upgrade (on 3"d and 7th year) Ka Kb Labor cost La Lb Useful life (years) 5 5 Warranty period (years) N