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Let vec(a) = hat(i) + hat(j) - 3 hat(k)...

Let `vec(a) = hat(i) + hat(j) - 3 hat(k) and vec(b) = 2 hat(i) + hat(j) + hat(k) `
Statement - I: Vectors `vec(a) and vec(b)` are perpendicular to each other
Statement - II: `vec(a) . vec(b) = 0`

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