For a=⟨3,1,−2⟩\mathbf{a} = \langle 3, 1, -2 \ranglea=⟨3,1,−2⟩ and b=⟨1,2,3⟩\mathbf{b} = \langle 1, 2, 3 \rangleb=⟨1,2,3⟩, compute a⋅b\mathbf{a} \cdot \mathbf{b}a⋅b.
111
−1-1−1
555
−5-5−5