A forklift will last for only 4 more years, It costs $6,900 a year to maintain. For $24,000 you can buy a new lift that can last for 12 years and should require maintenance costs of only $3,900 a year. a-1. Calculate the equivalent cost of owning and operating the forklift if the discount rate is 5% per year. Note: Do not round intermediate calculations. Round your answer to 2 decimal places. a-2. Should you replace the forklift? b-1. Calculate the equivalent cost of owning and operating the forklift if the discount rate is 13% per year. Note: Do not round intermediate calculations. Round your answer to 2 decimal places. b.2. Should you replace the forklift