HELP PLZZ
I WILL CROWN BRAINLIEST
Just one simple question

i) OC=a+b

ii) BA=a-b

iii)CA=-b

Step-by-step explanation:

i) because it is a parallelogram AC=OB and therefore AC=b

to find OC you do OA+AC which is a+b

OC=a+b

ii) to find BA you do BO+OA

BO=-b as it is the opposite direction

OA=a

so therefore BA=a-b

iii)CA is the opposite of AC which was b so CA=-b