Help vectors due tomorrow!!!!?

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OAB is a triangle with OA=a and OB=b. P and Q are the mid-points of OA and AB, respectively.





DIAGRAM---%26gt;http://i210.photobucket.com/albums/bb154...





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a)PA b)AB c)AQ d)PQ

Help vectors due tomorrow!!!!?
Part a)


PA = (1/2) a





Part b)


a + AB = b


AB = b - a





Part c)


AQ = a + (b - a) - (1/2) b


AQ = (1/2) b





Part d)


(1/2) a + PQ = (1/2) b


PQ = (1/2) b - (1/2) a
Reply:where's ur Qn?
Reply:Where's the question?