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If vec(a) = 3 hat(i) + 4 hat(j) + hat(k...

If ` vec(a) = 3 hat(i) + 4 hat(j) + hat(k) and vec(b) = hat(i) + hat(j) - hat(k) ` , then `"Comp"_(vec(b))vec(a)= ` . . . .

A

` 3 sqrt(2)`

B

` 2 sqrt(3)`

C

` - 3 sqrt(2)`

D

` - 2 sqrt(3)`

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