Wondering how to get 13%. If it is possible, don't use excel to solve this!!! I can't use excel in exam

Project Year 0 Cash Flow A -10,000 -5,500 Year 1 Cash Flow 4,000 3,500 Year 2 Cash Flow 4,000 3,500 Year 3 Cash Flow 4,000 3,500 Year 4 Cash Flow 4,000 3,500 Discount NPV Rate 0.15 1.420 0.15 4,492 18) If you make the decision to switch from project B and instead invest in project A, the IRR of that decision is closest to: a) 13% b) 15% c) 22% d) 30% e) 52%