Hello, I need help with the following two homework question for my class. Can you please help? Also, please place details on how to solve it. I need them for my notes.

1.

Please do all parts a-c. (a) Find a unit vector u, having the same direction as: 3i + 4j. (b) Find the measure of the angle between a = and b = (c) Find a x b given a = and b =Find an equation of the plane through P(-11, 4, -2) with normal vector a =