6. Let u be the vector consisting of the first 3 digits of your student ID number and v be the vector consisting of the last 3 digits of your student ID number. For example, if my student ID was 1234567, I would have u= (1,2,3) and v= (5,6,7). (a) Calculate uv. (b) Find the angle between u and v. Remember to work in radians.