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Write two different vectors having same ...

Write two different vectors having same direction.

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Consider `vec a=2hati- hatj+2 hatk` and `vec b=4hati-4hatj+2hatk`
Direction cosines of `veca` are `2/3,-1/3,2/3`
Direction cosines of `vecb` are `2/3,-1/3,2/3`
Thus, `veca ` and `vec b` are two different vectors having same direction.
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  2. Write two different vectors having same magnitude.

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  3. Write two different vectors having same direction.

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