if you don't know how to solve an exercise you can skip it but please do best to solve as much exercise as possible.

thank you

Project cash flows in $ Interest Net present value rate A B C D E A B C D E -100 -100 -200 -50 0,00 80 70 20 120 -100 0,01 900 70 10 40 -50 0,02 40 5 40 0 0,03 40 180 -20 150 0,04 5 O V O UT A W N H O S 60 40 150 0,05 50 30 100 0,06 40 100 0,07 30 0,08 20 0,09 10 0,10 0,11 TRI 0,12 0,13 0,14 0,15 0,16 0,17 0,18 0,19 0,20 0,21 0,22