Answer:
Project A's NPV = $5.56
Project B's NPV = $3.14
Step-by-step explanation:
year project A project B
0 -$31 -$19
1 $7 $13
2 $12 $6
3 $22 $5
Project A's NPV = -$31 + $7/1.05 + $12/1.05² + $22/1.05³ = -$31 + $36.56 = $5.56
Project B's NPV = -$19 + $13/1.05 + $6/1.05² + $5/1.05³ = -$19 + $22.14 = $3.14