Can some please help me with these practice questions i can't get to the right answer. thanks!

Because of its age, your car costs $10,000 annually in maintenance expense. You could replace it with a newer vehicle costing $9,700 that would be expected to have a life of 3 years. If your opportunity cost of capital is 9%, by how much must maintenance expense decrease on the new vehicle to justify its purchase? $ (please round your final result to 2 decimals, but keep as many decimals as possible during calculation) Seabreeze Properties is evaluating a real estate investment of Green Hills Estates. Management plans to buy the property today and sell it 9 years from today. The initial cost of the property is $9 million and the expected sale price is $55 million. What is the lFlFl of the investment? Enter your answer as a percentage and rounded to 2 DECIMAL PLACES. Do not include the percentage sign in your answer. Enter your response below