Question 1 (20 points): Calculate the payback period, discounted payback period,the after tax NPV, and the after tax IRR for the following After Tax Cash Flow, assuming a minimum discount rate of 10%. Please show your work and include all the required equations. Year O ATCF | C-20.000 | C-10.000 | C-10,000 | I-I 8.000 | 18.000 7 10 | 1-18.000 | 1-20.000 | 1-20.000 | 1-20.000 114,000 114,000