A city is described parametrically by the equation r = (ai + bj+ck) + svi + tv₂ where v₁ = 3i+j+ k and v₂ = i +4j-7k A city block is a rectangle determined by ₁ and ₂. East is in the direction of , and north is in the direction of v2. Starting at the point (a, b, c), you walk 1 block east, 4 blocks north, 3 blocks west and 3 blocks south. (a) What are the parameters of the point where you end up? S= t= (b) What are the coordinates at that point? 9. y =

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