How would I answer the following three vector questions?

Question 18 (1 point) In rectangle ABCD, X and Y are midpoints of AB and AD respectively. It d' = AX and b = AY , then DB is equal to: Oazh - 2d Owed + 26 Odza - 28 Odad -26 Question 19 [1 point) Usten In rectangle ABCD, X and Y are midpoints of AB and AD respectively. It d' = M. and b = AY , then XC' is equal to: Ound - b Ogb - d Question 20 (1 point) Let ABCDEF be a regular hexagon with A B = 1 and BC - 7/ . Express BD in terms of u and of O-1+ 27 O-utv