Answer :

Answer:

Vector CA = 2a

Vector AB = a - b

Vector BC = 3a - b

Step-by-step explanation:

a) Vector CA = 2 × vector OA = 2a

b) Vector AB = vector BO + vector OA = - b + a = a - b

c) Vector BC = vector CA + vector AB = 2a + a - b = 3a - b