Two linear algebra questions Please label them For question put (1) (2) and (3) and please do the same for question number two I will give a thumbs up if it's correct!

(1 point) Find the following expressions if a = 2i - 5k, b = i + j - 5k, and c = 4i + 4j + 2k. 1. a . b = 2. a . C = 3. b . c =(1 point) Find unit vectors that satisfy the given conditions: 1. The unit vector in the same direction as {5, 4) is 2. The unit vector oppositely directed to -4i + j + 4k is 3. The unit vector that has the same direction as the vector from the point A = (5, 2) to the point B = (8, 7) is