Let ABCD be a parallelogram such that AB=q, AD=p and ∠BAD be an acute angle. If r is the vector t...

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Let ABCD be a parallelogram such that AB=q, AD=p and ∠BAD be an acute angle. If r is the vector that coincides with the altitude directed from the vertex B to the side A D, then r⃗ is given by(1) r=q-(p·q/p·p)(2) r=-3 q+3(p·q)/(p·p)p
(3) r=3 q-3(p·q)/(p·p)p
(4) r=-q+(p·q/p·p) p

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Pls draw the diagram alongside it is difficult to understand, also pls explain each steps clearly

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