Can someone please help me with both of these questions using EUAW analysis.

6. A company must decide whether to buy Machine A or Machine B : At a 12% interest rate, which machine should be installed? Use an annual cash flow analysis in working this problem. 7. Consider the following three mutually exclusive alternatives: Assuming that Alternatives B and C are replaced with identical units at the end of their useful lives, and a 6% interest rate, which alternative should be selected? Use an annual cash flow analysis in working this