solve these problems:-

A recent environmental engineering graduate is try- ing to decide whether he should keep his presently owned car or purchase a more environmentally friendly hybrid. A new car will cost $26,000 and have annual operation and maintenance costs of $1200 per year with an $8000 salvage value in 3 years ( which is its estimated connomic service life) The presently owned car has a resale value now of $5000; one year from now it will be $3000, two years from now $2500, and 3 years from now $2200. Its operating cost is expected to be $1900 this year, with costs increasing by $200 per year. The presently owned car will definitely not be kept longer than 3 more years. Assuming used cars like the one presently owned will always be available, should the presently owned car be sold now, I year from now, 2 years from now, or 3 years from now? Use annual worth calculations at I = 10% per year and show your work.A small aerospace company is evaluating two alternatives the purchase of an automatic feed machine and a manual feed machine for a finishing process. The auto feed machine has an initial cost of $23,000, an estimated salvage value of $4000, and a predicted life of 10 years. at a rate of $12 per hour. The expected output is 8 tons per hour. Annual maintenance and operating cost is expected to be $3500. The alternative manual feed machine has a first cost of $8000, no expected salvage value, a S-year life, and an output of 6 tons per hour. However, three workers will be required at $8 per hour each. The machine will have an annual mail ance and operation cost of $1500. All projects are expected to generate a return of 10% per year. How many toms per year must be finished to justify the higher purchase cost of the auto feed machine? Calution\f\f\f