I'm confused on all of these

15.Graham has just won the lottery! He has two options for his winning payout. The first option is to receive annuity payments of $250,000 each year for the next 10 years. The second option is to receive $2,000,000 immediately. Assuming an interest rate is 6%, which option should Walter choose and why? A. Receive $250,000 for the next 10 years because it is $500,000 more over the life of the payout than the $2,000,000 received immediately B. Receive $2,000,000 immediately because its present value is $160,000 more than receiving $250,000 for the next 10 years. C. Receive $2,000,000 immediately because its present value is $605,000 more than receiving $250,000 for the next 10 years. D. Receive $250,000 for the next 10 years because its present value is $911,250 more than receiving $2,000,000 immediately. The following data is used in the next 3 questions: Muppets Manufacturing is considering purchasing a machine with an expected life of 9 years for $75,000. The machine has an estimated salvage value of $3,000. Muppets expects the new machine to generate cost savings of $13,545. 16.What is the payback period for the machine (round answer to 2 decimal places)? A. 11.00 years B. 5.54 years C. 5.32 years D. 25.00 years 17.What is the internal rate of return of the machine (round answer to 2 decimal places, if necessary)? A. 12% B. 5.54% C. 11% D. Between 7% & 8% 18.What is the accounting rate of return of the machine (round answer to 2 decimal places, it necessary)? A. 7.39% B. 18.06% C. 30.06% D. 18.81%