Question: Suppose a = i + j - 3 k and b = j + 2 k . a Find a b . b Find a

Suppose a=i+j-3k and b=j+2k.
a Find ab.
b Find a vector of length 5 units which is perpendicular to both a and b.
Suppose a = i + j - 3 k and b = j + 2 k . a Find

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