Hi experts! I am looking for some help with these finance questions I am really really stuck on how to find the right answer! I would really appreciate your help with these thank you so much! :)

eBook Problem Walk-Through Problem 11-10 Replacement Analysis St. Johns River Shipyards' welding machine is 15 years old, fully depreciated, and has no salvage value. However, even though it is old, it is still functional as originally designed and can be used for quite a while longer. The new welder will cost $82,000 and have an estimated life of 8 years with no salvage value. The new welder will be much more efficient, however, and this enhanced efficiency will increase earnings before depreciation from $26,000 to $52,000 per year. The new machine will be depreciated over its 5-year MACRS recovery period, so the applicable depreciation rates are 20.00%, 32.00%, 19.20%, 11.52%, 11.52%, and 5.76%. The applicable corporate tax rate is 40%, and the project cost of capital is 14%. Should the old welder be replaced by the new one? Old welder should be replaced. What is the NPV of the project? Do not round intermediate calculations. Round your answer to the nearest cent. $ 24097X eBook Problem 11-02 Operating Cash Flow The financial staff of Cairn Communications has identified the following information for the first year of the roll-out of its new proposed service: Projected sales $20 million Operating costs (not including depreciation) $9 million Depreciation $5 million Interest expense $3 million The company faces a 40% tax rate. What is the project's operating cash flow for the first year (t = 1)? Write out your answer completely. For example, 2 million should be entered as 2,000,000. $ 6800000X Hide Feedback Incorrect eBook Problem 11-03 Net Salvage Value Allen Air Lines must liquidate some equipment that is being replaced. The equipment originally cost $23 million, of which 80% has been depreciated. The used equipment can be sold today for $8.05 million, and its tax rate is 35%. What is the equipment's after-tax net salvage value? Write out your answer completely. For example, 2 million should be entered as 2,000,000. $ 6670000 Hide Feedback Incorrect O