Please solve it in explained steps so i could understand how it is done

Numerical 1 In the state of Arkansas, a 2-mile stretch of an asphalt mixture four-lane road cost approximately $2,429,610 dollars to build in 2013 . This cost includes the unbound aggregate base course, the asphalt mixture base course, the asphalt mixture binder course, and the asphalt mixture surface course. Assuming a 50-year design life, a 4.0% discount rate, and the following rehabilitation, maintenance, and salvage value cost, what is the NPV of the roadway section? State any assumptions you needed to make. - Maintenance (years 1-19): $3300 per lane per mile - Rehabilitation (year 20): $118,000 per lane per mile - Maintenance (years 20-24): \$1100 per lane per mile - Rehabilitation (year 25): $351,000 per lane per mile - Maintenance (years 25-44): \$2900 per lane per mile - Rehabilitation (year 45 ): $118,000 per lane per mile - Maintenance (years 45-50): \$1100 per lane per mile - Salvage value (year 50 ): $341,877 total - Assumptions are that maintenance will be performed in years of rehabilitation, and in year 50 of the design life, but will not occur in year 0 . Numerical 1 In the state of Arkansas, a 2-mile stretch of an asphalt mixture four-lane road cost approximately $2,429,610 dollars to build in 2013 . This cost includes the unbound aggregate base course, the asphalt mixture base course, the asphalt mixture binder course, and the asphalt mixture surface course. Assuming a 50-year design life, a 4.0% discount rate, and the following rehabilitation, maintenance, and salvage value cost, what is the NPV of the roadway section? State any assumptions you needed to make. - Maintenance (years 1-19): $3300 per lane per mile - Rehabilitation (year 20): $118,000 per lane per mile - Maintenance (years 20-24): \$1100 per lane per mile - Rehabilitation (year 25): $351,000 per lane per mile - Maintenance (years 25-44): \$2900 per lane per mile - Rehabilitation (year 45 ): $118,000 per lane per mile - Maintenance (years 45-50): \$1100 per lane per mile - Salvage value (year 50 ): $341,877 total - Assumptions are that maintenance will be performed in years of rehabilitation, and in year 50 of the design life, but will not occur in year 0