Calculus 3 Help Asap?

15. Let a = (3, −1, 2), b = (4, −3, 0). The projection of a on b is λb, where λ (lambda) =

(a) 3

(b) 3/5

(c) 1

(d) 3/25

(e) None of the above.

16. With a and b as in #15, the component of a in the direction of b is:

(a) 3

(b) 3/5

(c) 1

(d) 3/25

(e) None of the above

Can you answer asap, I'm confused on it please go step by step. Thank you!

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