1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution I am kind of confused as to why CD will be a function of L. For BE i think it is ( -4i + 8j - 8k) For CD i think it is (6j - 8k) ---> I don't think there is any i value because they seem to be lined up together. I think i am not understanding the question properly. Is it that D is not lined up with C and so there will be an i value?