Can you please explain it with details and explain how you get the (p/a, 8%, 4) can you show me how to plug the numbers to get the answers please i need to see calculations not the final answers thanks

Let. 15% per year, compounded annually. Determine the present worth ofthe b cash Bows 7.6 | 2 | 3 | End of Year Analyze the last two flows as 000+$400. Then, $10000+ 52000.3027t+$40000.61512)*(13225)-62693 7.7 Determine the EUAS for the re Ans $2739.71 746 Rework Problem 7.6 fori.8%per year, compounded annually