please answer the two question of the engineering economy as soon as possible, step by step with handwriting and a clear picture

14. Your company has an effective tax rate of 35% and a before tax MARR of 25%, what is the after tax Marr? 15. You're considering two projects. One is a short term project with a study period of 1 year. The other is a long term project with a study period of 5 years. Your MARR is 10%. Both projects have been found to have an IRR = 50%, however the short term project has PW of $360.36 and the long term project a PW of $3710.51. You're only able to select one project. Given these two alternatives, which one should you choose and why