Please help me answer A and B! <3 ill upvote your answer asap!

4.) You are evaluating two machines. Machine A has an initial cost of $340,000 and then an annual operating cost of $30,000 per year for its 5-year life. Machine B has an initial cost of $210,000 and then annual operating costs of $90,000 per year for its 3-year life. Your discount rate is 11%. a) Which machine would you select if you did not have to replace the machine at the end of its life? b) Which machine would you select if you did have to replace it