ABCDEF is a regular hexagon with point O as centre. Find the value of vec(AB) + vec(AC) + vec(AD) + vec(AE) + vec(AF)

ABCDEF is a regular hexagon with point O as centre. Find the value of

1.	ABCDEF is a regular hexagon with point O as centre. Find the value of vec(AB) + vec(AC) + vec(AD) + vec(AE) + vec(AF)
Answer» `6 vec(OA)` `6 vec(OB)` `6 vec(OC)` `6 vec(OD)` ANSWER :A