Qu. 2 (20 points) nsineerg is designing a highway bridge for the state Department of Transportation. Two mmarized in the table below Initial cost Annual maintenance costs Major rehabilitation costs Service Life Salvage Value Design! -$12,000,000 -$400,000 Design 2 $16,000,000 -$200,000 -$3,000,000 every 20th year ST REC 30 years $3,000,000 IT 2 TAL Note that the rehabilitation cost occurs every 20h year, i.e., in the years 20,40,60.... forever. (a) For an annual MARR of490, calculate the equivalent uniform annual cost (EUAC) of each design. (b) Which design is more economical? Answers to Qu. 2 (No points will be earned for answer spaces let blank. Full credit will be given only if all the necessary steps are clearly shown in the calculations and the answer is correct) Calculations (use both sides of the paper if more space needed)