Consider the vector 5 = (3,4, 3) e R3 (a) The magnitude of 17 is |17| = Number FORMATTING: You must give the exact answer; not a numerical approximation. To enter '5 type sqrt(a). (b) The unit vector {i that is in the opposite direction of 17 is a: E: FORMATTING: The answer must be in the form (a, b, c) ; don't forget the parentheses. To enter '5 type sqrt(a)