\vec{U1}

\vec{U2}

\vec{U3}

O = Intersect(xAxis, yAxis)
B = (5, 3)
C = (4, -2)
D = (0, 5)
E = Intersect(xAxis, yAxis)
u = Vector(E, B)
v = Vector(E, C)
w = Vector(E, D)